Symmetry+(x+and+y+axes)

Definitions: [|Symmetry]
 * 1) Y - Axis: If f(-x)=f(x) If you replace x with (-x) and solve the equation and the answer is the same then the Y - axis is even.
 * 2) Origin: If f(-x)= -f(x) If you replace x with (-x) and solve the equation and the answer is not the same then the origin is odd.
 * Symmetry ||  ||
 * Y-axis (even) || (x,y) and (-x,y) ||
 * Origin (odd) || (x,y) and (-x,-y) ||