Question

During the summer, Gavin tutors and Eva washes cars.To show their earnings, Gavin makes a graph and Eva makes a table. Who earns more money per hour, and by how much more?
Gavin: slope is 20$ per hour

Eva: Time,      Pay

2,          $23
5,          $57.50
7,           $80.50

Answer 1

To find Eva's slope divide 23 by 2.

23/2 = 11.5

SO, 

Gavin earns $8.50 more than Eva.

Hope this helps :)

Answer 2

Gavin earns 8.50 more than Eva