If x cannot equal zero and x is inversely proportional to y, which of the following is directly proportional to 1/x^2?
A: -1/y^2
B: 1/y^2
C: 1/y
D: y
E: y^2
I can't seem to get my head around this problem, usually I'm pretty good at these but I just can't put this one together. I would appreciate any help, thanks.