Find the constant of proportionality in this situation. What does it means for this situation?

Question

In 25 minutes Li can run 10 laps around the truck. Consider the number of laps she can run per minute.

Answer 1

This is a direct variation problem.  Direct variations have the form y = kx.  In your problem, y is the number of laps, x is the minutes, and k is the constant of proportionality.

 

y = kx

10 = k·25

10/25 = k = 2/5

 

k is the unit rate - the number of laps Li runs per minute.