Question

A cell phone company charges a flat fee plus an additional charge per minute. If the graph contains the points (0,15)
and (50,90)
, what is the fee the company charges per minute? Give your answer in exact change.(1 point)
The charge per minute is $
.

Answer 1

The per-minute charge is the slope: (90−15)/(50−0) = 75/50 = 3/2.

So the fee per minute is $3/2 = $1.50.