The distance your friend travels y (in miles) running x hours is represented by the equation y=7.5x. How many minutes does it talks for your friend to run one mile?

The first thing we must do is replace y = 1 in the equation and clear the value of x:

1 = 7.5x

Clearing x:

x = 1 / 7.5 = 0.13 h

Then, you should keep in mind the following conversion:

1h = 60min

x = (0.13) (h) * (60/1) (min / h) = 7.8 min

answer:

It will take 7.8 minutes to travel 1 mile