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? f(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

Answer:

$f(x)=85(1-0.25)^x$

Step-by-step explanation:

A new textbook is sold for $85.

Initial value = 85

The resale value of a textbook decreases by 25% with each previous owner

So, rate of decrease = 25% = 0.25

We are supposed to find  function represents the resale value of the textbook after x owners

Formula : $b=a(1-r)^t$

where b is the value after x owners

a is the initial value

$f(x)=85(1-0.25)^x$

So, The required function is $f(x)=85(1-0.25)^x$

Answer 2

Answer:

THE ANSWER IS

f(x) = 85(1 -0.25)^x

Step-by-step explanation:

The growth rate is -25%, so the growth factor is 1-25% = 1 - 0.25.

Each increase in the number of previous owners causes the value to be multiplied by this growth factor, so the overall multiplier is (1 -0.25)^x

The value is the initial value times this multiplier:   f(x) = 85(1 -0.25)^x.

HOW TO FIND RESALE  VALUE

Resale value is the amount of money you get if you sell something you already own. Whether you are selling a car, a house, a boat, or something smaller, knowing the resale value will help you to correctly price or value your item. Gather all the information you can on the item you want to sell

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