Question

A bike travles 12.5 miles in 2 hours and 30 minutes and 27.5 miles in 5 hours and 30 minutes. What is the constant of proportionally?

Answer 1

Distance = k * time
12.5 = k * 2.5
k = 12.5/2.5 = 5

Make sue k works for the other data: 27.5 miles in 5.5 hours.
distance = 5 * time
put time = 5.5
distance = 5 * 5.5 = 27.5 miles which matches the data given in the problem.

So k = 5 miles/hr.