parabola equation

If we start at the vertex (it does not matter where it is on the graph), go over 1 and count how much you go up or down to determine the magnitude. nex parabola combo Several examples and for simplicity's sake, keep the vertex at the origin If I go over one up two, then the equation is y = 2x^2 over 1 up 3 it is y = 3x^2, over 1 down 1, then y = - x^2, over 1