Question

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

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

Answer 2

Answer:

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

Step-by-step explanation: