UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B 21st Century Teaching and Learning: Project-based Unit
Snapshot of Unit Content and Student Expectations
Title of Unit: The Amazing Amusement Unit Designers:
Lynn Shelton (Arlington Public Schools) Mirela Geagla (Arlington Public Schools) Context of the Project: Amusement Parks
Number of Class Hours:
16-17 hrs. Unit
Design: Project-based Unit Other Subject
Areas/Disciplines Addressed in the Unit:
Physics Statistics Economics
Driving Question: Can you design the ultimate ride for a new amusement park?
Mathematics Content Addressed:
Modeling of motion using linear, quadratic and/or sine waves. Data collection and analysis, including normal distribution. Use of geometric scale modeling
Mathematical Process Goals Addressed
_X_ Problem Solving _X_ Communication _X_Reasoning _X_Connections _X_Representations
Assumption of Prior Knowledge:
Linear functions and modeling Quadratic Functions
Courses for Which the Unit is Appropriate
AFDA, Algebra 2 or above
College and Career Readiness/21st Century Skills
BIE Page 35-37
T for skills to be taught and expected to use during the unit,
E for skills student are expected to know and be able to use during this unit
A for skills that will be assessed during this unit
_E, A_Collaboration _E_Research _E,A_Communication (Oral and/or Written)
_T,A_Technology _E,A_Critical Thinking/Decision Making
_A_Other: (Describe) Creativity
Major Student Products and/or Performances:
Group
Oral presentation Design of the ride
Presentation Audience:
x Class
UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B Individual Written reflection Expert Community Other:
Engage the students interest and inquiry:
Class discussion about the “best ride” at area amusement parks
Evaluation: Formative
Assessments (During the Unit)
Interview x Practice Presentations
Mathematicians Journal x Notes
Preliminary
Plans/Outlines/Prototypes
x Checklists
Rough Drafts Concept maps
Field Tests Other: quiz x
Summative Assessment (End of Project)
Written Products, with a rubric x Peer Evaluation, with a
rubric
x
Oral Presentation with a rubric x Self Evaluation, with a
rubric
x
Other Product(s) or
Performance(s), with a rubric
x Other:
Resources Needed: On-site people, facilities:
Physics teacher Engineering teacher
Equipment/Technol ogy:
Computers, graphing calculators
Materials: Poster board paper, rulers, writing utensils
Community Resources:
Reflection Methods: Individual, Group, and/or Whole Class
Mathematicians Journal x Small/Focus Groups x
Whole Class Discussions x Fishbowl Discussions
Survey Other: written product x
Material Adapted From:
UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B
Quick Snapshot for the Sequence of Unit Activities
UNIT TITLE: The Amazing Amusements MINUTES PER CLASS 90 minutes
D a y 1 D a y 2 D a y 3 D a y 4 D a y 5
P R O J E C T W E E K O N E
Notes
Whole class discussion about amusement rides and introduce project: HO#1
Assign groups and roles
Group task on linear modeling and quadratic functions: HO#2
Math journal entry
Quadratic modeling of pumpkins: HO#3
Project brainstorming
Individual modeling assessment HO#4
Project work time
Project update
Peer evaluation rubric HO#5
Statistics activity (letters in
name) HO#6
Project work time
Project workday
Give rubric HO#7
Group interviews
D a y 6 D a y 7 D a y 8 D a y 9 D a y 1 0
P R O J E C T W E E K T W O
Notes
Individual statistics assessment HO#8
Ferris wheel activity HO#9
Project work time
Preliminary design due for peer evaluation (rubric): HO#7
Finalize design and draft advertisement for their ride
Complete advertisement
Plan oral presentation
Begin work on individual paper
Captain meeting
Finalize individual papers
Practice for oral presentation
UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B
What do students need to know and be able to do to complete the unit successfully?
Project: The Amazing Amusement
Analyze each major task and the final project for the unit for the knowledge and skills necessary to produce a high-quality product.
How and when will students assess their own necessary prior knowledge and skills?
How will they remediate their own gaps or weaknesses in expected prior knowledge and skills?
KNOWLEDGE AND SKILLS NEEDED Assumed
already learned Students will self-assess Will be learned and assessed during the unit 1. Linear functions and modeling x
2. Quadratic functions and modeling x
3. Measures of central tendency x x
4. Normal distribution and z-scores x
5. Periodic data modeling x
6. Scale drawing x
7.
8.
What project tools will students use to monitor their progress through the unit and especially the project?
X Student developed Know/need to know lists
X Student Mathematician’s Journals X Student developed Task lists X Teacher developed Rubrics
UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B
Unit Title: The Amazing Amusement
Driving Question: Can you design the ultimate ride for a new amusement park?
Project Description: The design and advertisement of a new amusement park ride, including a written product and oral presentation
ENGAGE
How will
students’ interest be piqued so they want to engage in the inquiry in this project-based unit?
Number of min _30 __
1. Teacher leads class discussion about popular amusement park
rides.
“What is your favorite amusement park ride?” “Why?” “What is the maximum drop, the maximum velocity? “ “How long is the ride?”
“What amusement park has your favorite ride and what is the entry fee for that park?”
HO#1: Discussion questions with photos of rides
2. Assign groups (3 – 4 students) and roles including a captain
Mathematician Journal Prompts
EXPLORE
Teacher provides guidance for the explorations to prepare students with the
knowledge and skills to engage in the project-based unit.
Students will self-assess on the prior knowledge and skills assumed for the unit
Number of hours_4.5__
Group tasks involving linear and quadratic modeling
Activity 1: HO#2: Linear and Quadratic Functions Review Students will work together to complete a review of linear and quadratic functions and modeling(HO#2). This activity reviews using graphs to model linear and quadratic functions.
Materials/Equipment/Resources Needed: HO#2, HO#2A
Activity 2: HO#3: Pumpkin Chucking
Students are expected to graph data by hand and using vertex form find a quadratic equation of best fit. Students use the graphing calculator to graph another set of data and using standard form find the equation of best fit. Students use their equations and graphs to make predictions.
(HO#3: Pumpkin Chucking) Answer sheet for teachers HO#3A
Students need Graphing calculators
List of support linear websites
http://home.windstream.net/okrebs/page4.html Mathematician Journal Prompts What additional information do you need to complete this project?
21 Century Teaching and Learning Inquiry Learning Project-based Learning Unit
UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B
/Notes/1a%20-%20linear%20functions.htm
Activity 3: Project brainstorming
Students are in groups to begin working on their project. Possible teacher posed questions to assist student groups?
What type of park do they want to design?
Is there a theme?
What will make the owner pick their design? Costs?
Activity 4: HO#6: What is in a Name?
Students are expected to collect data and calculate the measures of central tendency graph the data, sketch the normal curve for the data and calculate probabilities of the normal distribution.
Answer sheet for teachers HO#6A Students need graphing calculators
Activity 5: HO#9 Ferris Wheel
Students are expected to model the motion of a ferris wheel using a cosine function with transformation and make predictions.
Answer sheet for teachers HO#9A Students need graphing calculators.
EXPLAIN
Teacher introduces the project and prepares students to work independently in small groups Number of Hours_0.5_
The teacher launches the project and explains the following:
1. The final project is to design a ride and to create an
advertisement that will convince an interested buyer to purchase your idea.
2. The expectations are as follows: to write a letter describing
the product, the mathematics that was used, and the reasons that support those ideas.
3. Present your project to the class.
HO#7: Assessment Rubrics
UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B
ELABORATE
The student groups are working independently with teacher consultations.
Number of Hours__9___
Student groups will develop the advertisement, create the visual and write the paper for their new ride.
Teacher interviews student groups regarding project progress to date.
Teacher asks students to peer assess preliminary designs of other groups (HO#7)
Teacher meets with group captains to determine project completion.
Mathematician Journal Prompts
EVALUATE
Working groups submit products or make
presentations
Number of Hours_1.5__
Teacher collects peer evaluation rubrics (HO#5)
Teacher gives two assessments . ( HO#4 and HO#8)
Teacher grades the project using the rubrics (HO#7)
Mathematician Journal Prompts
UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B
Amusement Park Rides
What makes an amusement park ride thrilling or popular?
Check out some interesting facts about the Anaconda Ride at Kings Dominion:
Maximum speed 50mph
Sends visitors into a 360 ° vertical loop after exiting the tunnel tower
UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B
HO#2
Linear and Quadratic Functions Review The Dance Class
A dance class meets once a week for 15 weeks in a studio.
Suppose that:
- it costs m dollars to rent the studio for 15 weeks.
- the number of students is n.
- each student pays f dollars per course
- the teacher makes a profit of p dollars at the end of the course.
1. Given that m = $500 and f = $70, write an equation to show how the profit, p depends on n,
the number of students.
2. Graph the equation and explain the significance of the point where the graph crosses the
y-axis.
3. What is the minimum number of students required in order for the teacher to make some
UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B
The Sidewalk Stones
In Prague some sidewalks are made of small square blocks of stone.
The blocks are in different shades to make patterns that are in various sizes.
Pattern #1:
UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B
Pattern #3:
UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B
2. Which pattern has a total of 841 gray blocks?
3. How many white blocks has that pattern?
UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B
HO#2A
Linear and Quadratic Functions Review - Answer Key
The Dance class
A dance teacher runs a dance class for 15 weeks. The class meets once a week in a studio. Suppose that:
- it costs the teacher m dollars to rent the studio for 15 weeks.
- the number of students is n.
- each student pays a single fee of f dollars.
- the teacher makes a profit of p dollars at the end of the course.
1. Given that m = 500 and f = 70, write an equation to show how the profit, p depends on n, the number
of students.
p 70n500
UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B
14
.
7
70
500
0
500
70
n
n
n
therefore, at least 8 students.
The Sidewalk Stones
In Prague some sidewalks are made of small square blocks of stone.
The blocks are in different shades to make patters that are in various sizes.
1. How many blocks of each kind will pattern # n need?
Pattern #1:
White stones:
1
3
4
Gray stones: 12432
Pattern #2:
White stones:
2
5
4
Gray stones: 22452
Pattern #3:
White stones:
3
7
4
UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B
Pattern #n:
White stones:
n
(
2
n
1
)
4
8
n
2
4
n
Gray stones:
n
2
4
(
2
n
1
)
2
8
n
2
4
n
1
2. Which pattern has a total of 841 gray blocks?
Students should write and solve the following quadratic equation:
2
21
,
10
841
1
4
8
2
n
n
n
n
In conclusion pattern #10 has 841 gray blocks.
3. How many white blocks has that pattern?
There are 840 white blocks in that pattern.
4. Explain your work and show your calculations.
Students can use multiple ways to find the solutions; these include:
- solving a quadratic equation using factoring
- solving a quadratic equation by graphing
- solving a quadratic equation using the quadratic formula
UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B
Pumpkin Chucking
You are attending the Fall Festival. There is a pumpkin tossing contest where you can win a prize for guessing the distance a pumpkin will be tossed or for figuring out how to get the longest distance. You have been watching the pumpkins in action and have collected the following data.
A) Sketch a scatter plot of the data. B) What do you notice about the data?
C) Find an equation that fits the data.
D) Using your model, predict the distance for a 33◦ angle toss.
E) Using your model, how would you achieve the longest distance?
Angle Distance
20 272
30 362
40 409
50 401
60 337
UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B
The following table shows the population of a town from 1996 to 2004. Assume that t is the number of years since 1996 and P is measured in thousands of people.
Year,t 0 1 2 3 4 5 6 7 8
Population, P 22.8 25 26.5 27.1 27.8 28.1 27.9 26.9 26.1
a) Put the data on the graphing calculator.
Press STAT, ENTER
Put year data into L1 and population data into L2
b) Turn on the scatterplot for this data.
Press 2nd Y= ENTER
Turn on plot 1 for your data
Create a “good” window for your data and press GRAPH
c) What do you notice about this data?
d) Use a graphing calculator to find the best fitting model for the data.
Press STAT, right arrow(calc), 4 (line) or 5 (quad)& press ENTER
Round numbers to two decimal places if necessary
e) Using your model, what is the population in 2007?
UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B
Pumpkin Chucking
You are attending the Fall Festival. There is a pumpkin tossing contest where you can win a prize for guessing the distance a pumpkin will be tossed or for figuring out how to get the longest distance. You have been watching the pumpkins in action and have collected the following data.
B) What do you notice about the data?
Non linear, goes up and then down
C) Find an equation that fits the data.
y= -.3(x – 45)2 + 415
D) Using your model, predict the distance for a 33◦ angle toss.
x = 33 y = 372
E) Using your model, how would you achieve the longest distance?
415
The following table shows the population of a town from 1996 to 2004. Assume that t is the number of years since 1996 and P is measured in thousands of people.
Year,t 0 1 2 3 4 5 6 7 8
Population, P
22.8 25 26.5 27.1 27.8 28.1 27.9 26.9 26.1
Angle Distance
20 272
30 362
40 409
50 401
60 337
UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B
a) Put the data on the graphing calculator.
a. Press STAT, ENTER
b. Put year data into L1 and population data into L2
b) Turn on the scatterplot for this data.
a. Press 2nd Y= ENTER
b. Turn on plot 1 for your data
c. Create a “good” window for your data and press GRAPH
c) What do you notice about this data?
Non linear, looks quadratic
d) Use a graphing calculator to find the best fitting model for the data.
a. Press STAT, right arrow, 4 (line) or 5 (quad)& press ENTER
b. Round numbers to two decimal places if necessary
y= -.21x2 + 2.08x + 22.96
e) Using your model, what is the population in 2007?
UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B
Individual Modeling assessment
A bottle is filled with water. The water is allowed to drain from a hole made near the bottom of the bottle. The table shows the level of the water y measured in centimeters from the bottom of the bottle after x seconds.
Time (s) 0 20 40 60 80 100 120 140 160 180 200 220
Water level (cm)
42.6 40.7 38.9 37.2 35.8 34.3 33.3 32.3 31.5 30.8 30.4 30.1
Find and graph a linear regression equation and a quadratic regression equation.
UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B
Individual Modeling assessment
A bottle is filled with water. The water is allowed to drain from a hole made near the bottom of the bottle. The table shows the level of the water y measured in centimeters from the bottom of the bottle after x seconds.
Time (s) 0 20 40 60 80 100 120 140 160 180 200 220
Water level (cm)
42.6 40.7 38.9 37.2 35.8 34.3 33.3 32.3 31.5 30.8 30.4 30.1
Find and graph a linear regression equation and a quadratic regression equation.
Determine which equation is a better fit for the data.
Linear model:
Quadratic model:
UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B
HO#5
Collaborative work skills Peer evaluation rubric
Category 4 Leader 3 Assistant 2 Novice 1 Needs to
improve
Working with others
Almost always listens to, shares with and supports the efforts of others;
keeps the group members working
well together
Usually listens to, shares with, and supports the efforts
of others; does not cause “waves” in
the group.
Often listens to, shares with, and supports the efforts of others, but sometimes is not a good team
member.
Rarely listens to, shares with, and
supports the efforts of others.
Often is not a good team player.
Focus on the task
Consistently stays focused on the task
and what needs to be done; he/she is very self-directed.
Focuses on the task and what needs to be done most of the
time. Other group members can count
on this person.
Focuses on the task and what needs to be done some of the time.
Other team members must sometimes nag, prod, and remind to keep this person
on-task.
Rarely focuses on the task and what needs to be done. Lets others do the
work
Quality of Work
Provides work of the highest quality.
Provides good quality work.
Provides work that occasionally
needs to be checked/redone by
other group members of ensure quality.
Provides work that needs to be checked/redone by
others to ensure quality.
Attitude
Is never publicly critical of the project
or the work of others. Always has
a positive attitude about the task(s).
Rarely is publicly critical of the project or the work of others. Often has a positive attitude
about the task(s).
Occasionally is publicly critical of
the project or the work of other members of the group. Usually has
a positive attitude about the task(s).
Often is publicly critical of the project or the work of other members of the group. Often has a
negative attitude about the task(s).
UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B
“What is in a Name?”
A) Class Data collection: Each student will count the number of letters in their first
name and record their data in the table below.
B) Calculate the mean for this data.
C) Calculate the median for this data.
D) Calculate the mode for this data.
E) How do these three measures of central tendency compare?
UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B
G) If we sampled the whole school, how do you think these measures would change?
H) Which of these measures do you think most accurately represents the typical length
of a student’s first name? Why?
I) Calculate the standard deviation for this data.
J) Draw a bar graph for this data
K) Do you notice any patterns with this graph?
UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B
N) What’s the probability that someone’s first name is between 5 and 10 letters?
O) Suppose there are 1500 students in this school, about how many students would you
expect to have a first name less than 4 letters long?
P) Another class collects last name data. They find that the length of a last name is also
UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B
HO#6A
“What is in a Name?”
A) Class Data collection: Each student will count the number of letters in their first name and
record their data in the table below.
5 6 5 5 4
7 6 3 5 5
6 6 6 7 5
6 4 9 7 3
7 3 4 5 6
B) Calculate the mean for this data.
5.4
C) Calculate the median for this data.
5
D) Calculate the mode for this data.
5 and 6
E) How do these three measures of central tendency compare?
All are pretty close to 5
F) Do we appear to have any outliers?
Maybe the 9
G) If we sampled the whole school, how do you think these measures would change?
Answers will vary
H) Which of these measures do you think most accurately represents the typical length of a
student’s first name? Why?
UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B
1.4
J) Draw a bar graph for this data
K) Do you notice any patterns with this graph?
Bell curve
L) Is this data “normal”? Why or why not?
Pretty normal due to bell curve shape and mean=median=mode
M) Draw the normal curve for this data
N) What’s the probability that someone’s first name is between 5 and 10 letters?
61%
O) Suppose there are 1500 students in this school, about how many students would you expect to
have a first name less than 4 letters long?
240 students
P) Another class collects last name data. They find that the length of a last name is also
normally distributed and has a mean of 8 and a standard deviation of 1.8. Is it more unusual to have a first name of 9 letters or a last name of 12 letters?
UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B
HO #7
RUBRICS
Oral Presentation Rubric
Outstanding 5
Exceptional knowledge of subject
Effective integration of visual aids
Elaborates on topic enthusiastically and in detail
Well organized with effective transitions
Polished confident delivery: appropriate volume, clear
articulation, and solid eye contact
4 Satisfactory
3
Adequate knowledge of subject
Used visual aids
Communicates topic clearly
Logically organized
Satisfactory delivery
2
Needs Improvement 1
Minimum knowledge of subject
Inadequate use of visual aids
Unclear communication of topic
Poorly organized
Unsatisfactory delivery
Overall Oral Presentation rating:
UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B
Advertisement (Visual) Rubric
Outstanding 5
Information displayed is result of thorough, insightful research
Mastery of all artistic principles: balance, rhythm, unity, contrast,
and emphasis
A very creative, professional product with audience appeal
No errors in spelling, grammar, or punctuation.
4 Satisfactory
3
Information displayed is result of sufficient research
Some evidence of artistic principles: balance, rhythm, unity,
contrast, and emphasis
A neat and functional product
Few errors in spelling, grammar, or punctuation.
2
Needs Improvement 1
Information displayed is result of insufficient research
Little evidence of artistic principles: balance, rhythm, unity,
contrast, and emphasis
A product that lacks visual appeal; not carefully prepared
Too many errors in spelling, grammar, or punctuation.
Overall Advertisement (Visual) rating:
UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B
Essay/Paper Rubric
Outstanding 5
Exceptional knowledge of topic demonstrated
Catchy, interesting and clear introduction
Carefully organized
Works cited page included
Few, if any, errors in grammar, spelling, usage and
mechanics
4 Satisfactory
3
Adequate knowledge of topic demonstrated
Clear introduction
Somewhat organized
Works cited page incomplete
Some errors in grammar, spelling, usage and mechanics
2
Needs Improvement 1
Minimal knowledge of topic demonstrated
Ineffective or unclear introduction
Poorly organized
Works cited page missing
Too many errors in grammar, spelling, usage and mechanics
Overall Essay/Paper rating:
UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B
Individual Statistics Assessment
Refrigerator temperature in degrees Fahrenheit
36 38 35 33 33
35 32 34 37 37
36 35 36 34 35
34 35 33 36 34
37 36 32 35
1) Calculate the
a) mean b) median
c) mode d) standard deviation
2) Draw the bar graph for the above data.
UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B
4) Draw the normal curve for this data including the z-scores.
5) What is the z-score for 34◦ ?
6) What percent of the data is between 33◦and 37◦ ?
7) What would be the temperature of the coldest 10% of the refrigerators?
UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B
Individual Statistics Assessment
Refrigerator temperature in degrees Fahrenheit
36 38 35 33 33
35 32 34 37 37
36 35 36 34 35
34 35 33 36 34
37 36 32 35
1) Calculate the
a) mean b) median
34.916 35
c) mode d) standard deviation
35 1.613
2) Draw the bar graph for the above data.
3) Does this data look normal? Why or Why not?
UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B
4) Draw the normal curve for this data including the z-scores
5) What is the z-score for 34◦ ?
-.625
6) What percent of the data is between 33◦and 37◦ ?
79%
7) What would be the temperature of the coldest 10% of the refrigerators?
Below 33
8) If you tested 300 refrigerators, how many would you expect to have a temperature above 36◦ ?
UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B
Ferris’s Wheel
When you ride a Ferris Wheel, your distance (y) in feet from the ground, varies with time (x) in minutes since you got on the wheel. Suppose that the Ferris Wheel at the County Fair has a diameter of 40 feet and that its axle is 25 feet above the ground. This super-fast wheel makes 3 revolutions per minute.
1) Draw a picture of this Ferris Wheel and label given information.
2) At x=o seconds, you get on the Ferris Wheel. How long does it take to get to the top of the
wheel? How long until you are back to the starting point?
3) Fill in the following data chart.
Time in seconds (x) Distance in feet (y)
0
5
10
15
20
UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B
Because the distance varies periodically with the time, we need a periodic function to fit this graph. We will be using a cosine curve.
y=Acos(B(x - C)) + D
We will need to determine the values of A, B, D and C. These values are transformations of the parent function y=cos(x).
5) D = mid-line of the wave (which is the vertical shift). Find D for our graph.
6) A = the amplitude of the wave (which is how high/low the waves goes from the mid-line). Find
A for our graph.
7) C = the time of the first maximum of the wave (which is the horizontal shift). Find C for our
graph.
8) B= the number of cycles in 360˚ = 360 ÷ period (time for one cycle). Find B for our graph.
9) Write the cosine equation for our graph.
10)Graph this equation on your calculator with an appropriate window. How well does it match your
sketch in #4?
11)What is your distance after riding the Ferris Wheel for 17.5 minutes?
12) How long have you been on the Ferris Wheel when your height reaches 35 feet for the second
UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B
Ferris’s Wheel
When you ride a Ferris Wheel, your distance (y) in feet from the ground, varies with time (x) in minutes since you got on the wheel. Suppose that the Ferris Wheel at the County Fair has a diameter of 40 feet and that its axle is 25 feet above the ground. This super-fast wheel makes 3 revolutions per minute.
1) Draw a picture of this Ferris Wheel and label given information.
5) At x=o seconds, you get on the Ferris Wheel. How long does it take to get to the top of the wheel? How long until you are back to the starting point?
10 seconds, 20 seconds
6) Fill in the following data chart.
Time in seconds (x) Distance in feet (y)
0 5
5 25
10 45
15 25
20 5
UVA-SCPS Office of Mathematics Outreach with support from VADOE Mathematics and Science Partnership Grant Program NCLB Title II Part B
Because the distance varies periodically with the time, we need a periodic function to fit this graph. We will be using a cosine curve.
y=Acos(B(x - C)) + D
We will need to determine the values of A, B, D and C. These values are transformations of the parent function y=cos(x).
5) D = mid-line of the wave (which is the vertical shift). Find D for our graph. 25
2) A = the amplitude of the wave (which is how high/low the waves goes from the mid-line). Find A for our graph.
20
3) C = the time of the first maximum of the wave (which is the horizontal shift). Find C for our graph.
10
4) B= the number of cycles in 360˚ = 360 ÷ period (time for one cycle). Find B for our graph.
18
5) Write the cosine equation for our graph.
y=20cos(18(x – 10)) + 25
6) Graph this equation on your calculator with an appropriate window. How well does it match your sketch in #4?
Very well
7) What is your distance after riding the Ferris Wheel for 17.5 minutes?
45 ft
8) How long have you been on the Ferris Wheel when your height reaches 35 feet for the second time?