1. when y is zero, what is x? Conversly, when x is zero, what is y?

2. Begin by solving for y.

a)if your insert any -x and x which both yield a positive y, then there is symetry about y.

b)If x gives y, and -x gives -y, thenthere is symetry about the origin.

c) assuming that y is not a function, then if x gives two values of y (+/-y), then there is symetry about the x axis.