Joey enlarged a 3-inch by 5-inch photograph on a copy machine. He enlarged it four times. The table below shows the area of the
photograph after each enlargement.
0
1
2
3
4
Enlargement
Area (square inches)
15
18.8
23.4
29.3
36.6
What is the average rate of change of the area from the original
photograph to the fourth enlargement, to the nearest tenth?
(1) 4.3
(3) 5.4
(2) 4.5
(4) 6.0