Question

The amount Troy charges to mow a lawn is proportional to the time it takes him to mow the lawn. Troy charges $30 to mow a lawn that took him 1.5 hours to mow.

Which equation models the amount in dollars, d, Troy charges when it takes him h hours to mow a lawn?

A) d = 20h
B) h = 20d
C) d = 45h
D) h = 45d

Answer 1

First, let's find the amount of money Troy charges per hour.

$30 / 1.5hrs = $20 / hr

d = $20h

A is the correct answer choice.