50 (0,40,000)
40
30
value in thousands of dollars
(1,24,000)
20
10
0.5
1
decades since purchase
1. Express the car's value, in dollars, as a function of time d, in decades, since purchase.
2. Write an expression to represent the car's value 4 years after purchase.
3. By what factor is the value of the car changing eac