Solution
After examining the table and the options, the model equation can be found by picking one value for x in the table and determining if it will give you f(x)
x = year of purchase
f(x) = value of the car
For this test we will use x = 2 and f(x) must be = $9600 or it is wrong
1) f(x) = 15000(0.08)^x
f(x) = 15000(0.08)^2
f(x) = 96
This is wrong
2) f(x) = 15000(0.8)^x
f(x) = 15000 (0.8)^2
f(x) = 9600
This is the required equation since f(x) = 9600
3)