Question

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? You may choose more than one correct answer.
y=.85 x
Of(x) = 1.15
Sale = Original - 15
Of(x) = x - 15
Sale = Original - 15(Original)

Answer 1

The function is:

`f(x) = x - 0.15x`

Can also be written as:

`Sale = Original - 0.15(Original)`

Explanation:

Given that the sale percentage is 15%

In general, the sale price is calculated by finding the discount according to discount percentage and then subtracting the discount from original price.

Given that x is the original price

Then the discount will be:

`Discount = Original Price * 0.15\\Discount = 0.15x`

The sale price will be:

`Sale Price = Original\ Price - 0.15(Original\ Price)\\`

As x is the original price

`f(x) = x - 0.15x`

Can also be written as:

`Sale = Original - 0.15(Original)`