A linear function f gives a company's profit, in dollars, for selling…

Question

Prompt

A linear function f gives a company's profit, in dollars, for selling x items. The company's profit is

190 w h e ni t se l l s 4 i t e m s, an d i t s p r o f i t i s

670 when it sells 10 items. Which equation defines f?

f (x) = 180 x - 670

f (x) = 67 x

f (x) = 80 x - 10

f (x) = 80 x - 130