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7-30.

A parabola has vertex (2, 3) and contains the point (0, 0). Write an equation for this parabola. Homework Help ✎

For a vertically-oriented parabola, use the equation y = a(xh)2 + k where (h, k) = (2, 3) and (x, y) = (0, 0).
For a "sleeping parabola" use the equation x = a(yk)2 + h.

0 = a(0 − 2)2 + 3

−3 = a(4)