Math 7 ~ Constant of Proportionality

10.25

A movie ticket costs $10.25 per person. What is the con-stant of proportionality?

$40.00

The store sells books for $20.00 per book. How much would two books cost?

y = 55x

Kristen drives 55 miles per hour. What expression can you use to represent this relationship?

0.25x

Mike can run 4 laps in 16 minutes. What expression can you use to represent how many laps PER minute he can run?

5

Madison can do 10 jumps in 50 seconds. How many seconds does it take her to jump one time?

4

Mike can run 4 laps in 16 minutes. What is the rate of minutes per lap?

$2.75

Eleanor pays a total of $16.50 for every 6 shirts she has dry-cleaned. What does it cost to dry-clean one shirt?

$25.00

A refund you get varies directly as the number of cans you recycle. If you get a $3.75 refund for 75 cans, how much should you get for 500 cans?

$27.50

Eleanor pays a total of $16.50 for every 6 shirts she has dry-cleaned. How much would it cost for her to dry-clean 10 shirts?

k

In the equation [ y = kx], which letter represents the constant of proportionality?