Finding the Constant of Proportionality
Writing an Equation in the form y=kx
Graphing Proportional Relationships
Comparing Proportional Relationships
Random
100
What's the constant of proportionality?
k=5
100
Jude sends 45 E-mails in 15 minutes.
Write an equation to represent the relationship between emails y and minutes x
y=3x
100
What information is on the horizontal axis?
Time in hours
100
Store A sells 3 slices of pizza for $9. Store B sells 4 slices of pizza for $16. Which store has the better rate and what is it?
Store A. $3/slice
100
What is the name of this Stadium?
Autzen Stadium
200
Is this a proportional relationship? Why or why not?
No. There is not a constant connection between x and y.
200
Lenasia earned $640 in a 40-hour work week.
Write an equation to represent the relationship between total money y and hours x
y=16x
200
What information is on the vertical axis?
Number of wheels
200
Isaac and Neema are running a race. Isaac runs 5 meters per second. Neema runs 8 meters per second. If the race is 400 meters, who will finish first and what will their time be?
Neema with a time of 50 seconds
200
What is the full name of this movie?
Star Wars Episode I: The Phantom Menace
300
What's the constant of proportionality? Write your answer as a rate.
46 miles per hour
300
Write an equation in the form y=kx 
y=15x
300
Does this graph represent a proportional relationship between cost and tickets? Explain.
No. There is not a constant multiplier between cost and tickets. The graph does not go through the origin.
300
Oscar and Iddi are walking to school from their homes. It takes Oscar 15 minutes to get to school. It takes Iddi 20 minutes to get to school. If they both are walking 160 meters/minute, who walks farther to school and how far does he walk?
Iddi. He walks 3200 meters.
300
What is the street address of Kelly Middle School?
850 Howard Avenue
400
What is the constant of proportionality? Write your answer as a rate
$1.50 per ticket
k=1.50
400
y=2.5x
400
What does this point represent?
35 gallons of water are used in 7 minutes
400
Blet Soe rides his bike 15mph. Ruth's rate on her bike is expressed by the equation y=12.5x. How long would it take each person to ride 100 miles.
Blet Soe would take 6 hours and 40 minutes (6 2/3 hour). Ruth would take 8 hours.
400
Name one of these people.
Ringo Starr or Paul McCartney. Two of the four living members of The Beatles.
500
What is the constant of proportionality. Give your answer as a rate.
2/3 lap per minute
500
y=1/5x
500
Write an equation to represent this graph
y=2x+20
500
Store A sells 3 pounds of cheese for $12. Store B sells 5.5 pounds of cheese for $22. Which store has the better rate?
The rate is the same. $4 per pound
500
What is the name of this race?
Le tour de France