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

The first function is the answer

Since the value decreases by 25% each time, the next cost is the current cost times 0.75 (since new cost is 75% of current cost).to find the value of the book after x times sold, you can use:   just plug in the number of times it is resold to find the value.or you can do it this way a exponential function would represent it nicely f(x)=b*a^xreason being a decrease of %a = 1+rr = -25% = -0.25and b being what the original cost of the bookf(x)=85*0.75^xwhere f(x) is the price after x amount of previous owners