The graph shows the linear relationship between the maximum area in square feet that
can be painted and the number of gallons of paint used.
Paint Coverage
1,800
1,600
1,400
1,200
1,000
800
3 600
400
200
0
1 2 3
Number of Gallons of Paint
Which of these best represents the rate of change of the maximum area painted with
respect to the number of gallons of paint used?