A proportional relationship is a relationship between equivalent ratios. Imagine that ice
cream costs $2 per scoop. If you get one scoop of ice cream, you'll pay $2. If you get two
scoops, you'll pay $4, and for three scoops you'll pay $6.
These ratios of scoops to prices are equivalent. Therefore, the relationship between number
of scoops and total price is proportional. To find out the total price of your ice cream, you
can always multiply the number of scoops you're getting by the same number, 2.

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Which of these can be described with a proportional relationship?

A.) An athlete runs 1 mile in 7 minutes and another mile in 7.5 minutes.
B.) An athlete does 10 push-ups for every 1 mile she runs.
C.) An athlete runs 2 miles and does 25 push-ups.
D.) An athlete runs 5 miles 3 times a week.