Question

A horse runs for 0.25 h and travels 9 mi. The horse’s distance varies directly with the amount of time it runs.

How many miles will it run in 1.5 h?

Answer 1

I think it's 45 miles, hope this could help :)

Answer 2

First, you want to set up the equation. 

0.25h = 9m
1.5h = x

(x represents the unknown amount of miles.)

Now that you have an equation set up, you cross multiply and get:
0.25x = 9 · 1.5
0.25x = 13.5
x = 54

So the horse runs 54 miles in 1.5h