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

a. Find the constant of proportionality in this situation.

b. Write an equation to represent the relationship.

for 25 minutes, she can run 10 laps, then for 1 minute she will run 10/25.

(a) Let the number of Laps be L and the time spent M, the constant of proportionality = 10/25 = 2/5

(b) The equation to represent the relationship implies

M = 2/5 L