Somebody help. I've been agonising over this non-problem for hours--I saw a random equation while reading a maths book, x = y^2 - 3, which is a parabola. Any parabola can be put into the standard form (x - h)^2 = a(y - k)^2, and the farthest I got was x - (-3) = 1(y - 0)^2. (-3, 0) is the vertex, but I can't figure out where to go from there.
EDIT: Wait, never mind. I read my notes wrong, and the standard form is actually x - k = a(y - h)^2, which solves all my problems.