Math question need help

Question

How do you know if a function is even, odd, or neither?

Answer 1

Mark M. is correct. Another way to visualize this question for 2 dimensional functions in the x-y plane is that even functions are symmetric about the y-axis while odd functions are rotationally symmetric about the origin.

Answer 2

Even if f(-x) = f(x)

Odd if f(-x) = -f(x)