Question

Joseph is traveling on a road trip. The distance, d, he travels before stopping for lunch varies directly with the speed, v, he travels. He can travel 120 miles at a speed of 60 mph.
Write the equation that relates d and v.
How far would he travel before stopping for lunch at a rate of 65 mph?

Answer 1

d = kv

Substitute the 60 and 120 in.

120 = k * 60

k = 2

So, d = 2v

If v is 65, what is d?

2 * 65 = 130 miles