A sporting goods store is having a 15% off sale on all items. Which functions can be used to find the sale price of an item that has an original price of x ? Can choose more than one correct answer.

Question

A) ƒ(x) = x - .15x

B) Sale = Original - 15

C) ƒ(x) = 1.15x

D) Sale = Original - .15(Original)

E) y = .85x

Answer 1

A, D, and E are correct.

Answer 2

Taking 15% off is the same thing as only charging 85% so both D and E are correct