math
posted by Chevy .
Every four years the value of a Chevy Cabalier is reduced by half.
Purchase price $15,375
After t years of ownership:
Age of car: Value:
0 15,375
4 7,687.50
8 3,843.75
If P is price after t years, Which would be a good model for the values above?
a) P(t) = 15,375 (2)^t
b) P(t) = 15,375 (1/2)^t
c) P(t) = 15,375 (1/2)^t/4
d) P(t) = 15,375 (2)^t/4
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