Question

If f(x) is the total cost, in dollars, of x cupcakes, which of the following statements best describes the meaning of f(5) = 12?​

Answer 1

In f(x)

• f(x) is total cost
• x is total cupcakes

So in f(5)

• 5 cupcakes cost $12

Answer 2

• See below

Explanation:

This a form of the proportional relationship:

• f(x) = kx, where f(x) - total cost, k- cost of each item, x - number of items

We have:

• f(5) = 12

It means:

• Total cost of 5 cupcakes is $12