If I have an equation, q(x) = x, and I have to identify what the graph of that would look like, isn't it just going to be a straight line?

There are two straight lines to choose from -- one is horizontal across the x-axis on the 1, and the other is horizontal across the x-axis on the 2.

Which is correct?

Thank you.

1 answer

The way you described the given graphs, neither one is correct

q(x) = x or y = x
is a straight line passing through the origin and forming a 45° with the x-axis

Verification:
http://www.wolframalpha.com/input/?i=plot+q(x)+%3D+x