The resale value of a textbook decreases by 25% with each previous owner. A new textbook is sold for $85. Which function represents the resale value of the textbook after x owners? (x) = 85 (1 - 0.25) x

f (x) = 85 (1 + 0.25) x

f (x) = 85 (0.25) x

f (x) = (85 - 0.25) x

Question

Mathematics

Kaia Shields

8 October, 22:06

The resale value of a textbook decreases by 25% with each previous owner. A new textbook is sold for $85. Which function represents the resale value of the textbook after x owners? (x) = 85 (1 - 0.25) x

f (x) = 85 (1 + 0.25) x

f (x) = 85 (0.25) x

f (x) = (85 - 0.25) x

+3

Answers (1)

Know the Answer?

Sidney Figueroa · Answer 1

A exponential function would represent it nicely f (x) = b*a^x

Reason being a decrease of %

a = 1+r

r = - 25% = - 0.25

And b being what the original cost of the book

f (x) = 85*0.75^x

Where f (x) is the price after x amount of previous owners

The resale value of a textbook decreases by 25% with each previous owner. A new textbook is sold for $85. Which function represents the resale value of the textbook after x owners? (x) = 85 (1 - 0.25) xf (x) = 85 (1 + 0.25) xf (x) = 85 (0.25) xf (x) = (85 - 0.25) x

The resale value of a textbook decreases by 25% with each previous owner. A new textbook is sold for $85. Which function represents the resale value of the textbook after x owners? (x) = 85 (1 - 0.25) x

f (x) = 85 (1 + 0.25) x

f (x) = 85 (0.25) x

f (x) = (85 - 0.25) x