Please help me on this SAT question

Currrrryman
Wed, 30 May 2012 23:03:20 +0000

Well just plug in a value for x to get y.
let’s say x = 2.
so 4(2^2) = y^2
4(4) = y^2
16 = y^2
4 = y
So now that you know y and x, what is x in terms of y? well since x = 2, and y = 4, x is y-2. Thus (A).