Question

Which of the following functions has a graph that is a line?


a. f(x) = x
b. f(x) = x2
c. f(x) = |x|

Answer 1

1. f(x) = x

What you're looking for in a line is something in the form:
f(x) = ax + b

There should not be a ^2, ^3, etc., or |x|. | | indicates absolute value; this means that you just make the number inbetween the two bars negative; |2| = 2, |-7| = 7, etc.

Answer 2

is it a b or c haha sorry but im lost

Answer 3

a