Answer:
80 dollars.
Explanation:
function f(x) = 5* x
You are asked to find the price for a 16 in^2 painting.
f(x) = 5*16
f(x) = 80
This problem is hard to put into language because the units are in^2 but you do not square the number on the right. It is give to you as units^2
f(x) is in dollars.