Question

Number of years (x) 0 1 2 3
Value in dollars, v(x) 11,000 9,350 7,948 6,755


Which exponential function models the situation?

(1 point)

y=11000(0.85)x

y=11000(1.15)x

y=0.85(11000)x

y=1.15(11000)x

Answer 1

y = 11000(0.85)^x

Reason: 9350/11000 = 0.85, so the value is multiplied by 0.85 each year (15% decay), giving y = 11000·(0.85)^x.