Examples: 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 value in dollars 1000 800 2 3 640 which function can be used to determine the value of the laptop for no years after the purchase? (1) f(x) = 1000(1.2)* (3) f(x) = 1250(1.2)* (2) f(x) = 1000(0.8)* (4) s(x) = 1250(0.8)