12 marc bought a new laptop for $1250. he kept track of the value of
the laptop over the next three years, as shown in the table below.
years after purchase
1
2
3
value in dollars
1000
800
640
which function can be used to determine the value of the laptop for
years after the purchase?
(1) fx) = 1000(1.2)
(3) fx) = 1250(1.2)
(2)f(x) = 1000(0.8)
(4) fx) = 1250(0.8)