Finding the Constant of Proportionality
Proportional Equations
Interpreting Proportional Graphs
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
Who is this? Name him for full points and name what high school he went to for double points.
1,920 × 1,080
Justin Herbert, former Eugene 4J Spanish Immersion student, and Sheldon HS graduate.
200
What is the constant of proportionality? Write your answer as a rate
$1.50 per ticket
k=1.50
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
Is this a proportional relationship?
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 official nickname of Eugene?
Track Town, USA
300
What's the constant of proportionality? Write your answer as a rate.
46 miles per hour
300
The table represents the relationship between slices of pizza and their total cost.
y=2.5x
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
The graphs shows the elevation of two different helicopters after a given number of seconds. Which helicopter is ascending more quickly? Explain. 
Helicopter A. After 6 seconds, Helicopter A is 15 meters high, but in the same amount of time, Helicopter B is only 8 meters high.
300
3 out of every 100 working people in Eugene are employed by this corporation. What is it? Here are both the new and old logo.
400
Don't forget to include units
5 gallons per minute
400
To make enough hot cocoa for 8 mugs (m), you need 12 packets (p) of cocoa mix. Write the two equations that could represent this relationship. For the full credit. Write one of the two for half credit.
m=2/3p or p=1.5m
400
At the same rate, how much water is used in 12 minutes?
60 gallons
400
Blet Soe rides his bike 60 miles in 4 hours. 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
What is this? Full credit for its name with a chance for double points after the question.
Fern Ridge Reservoir
500
What is the constant of proportionality. Give your answer as a rate.
2/3 lap per minute
500
y=1/5x
500
What is the cost per ticket?
$2/ticket
500
The table and graph show the fuel efficiency for two different cars. Which is more efficient and why?
Car A. It uses 25 miles per gallon whereas Car B uses 22 miles per gallon.
500
These musicians both went to South Eugene High School. Name one for full credit, or name both for 2x credit
Michelle Zauner/Japanese Breakfast or Mat Kearney