Even and odd functions

From Mathematics

A function f on R is an even function if for all x in the domain of f,

f(x) = f(-x).

Such a function is symmetric with respect to the y-axis when graphed.

A function f on R is an odd function if for all x in the domain of f,

-f(x) = f(-x).

Such a function has rotational symmetry with respect to the origin.