Math

Hi, can anyone help to:
determine the equation of a parabola with the vetex (0,3) and passing through (3,4)?
How to figure out the coeffiecient of X?

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  1. using the vertex (0,3)
    it must be
    y = ax^2 + 3
    but (3,4) lies on it
    4 = a(9) + 3
    9a = 1
    a = 1/9

    y = (1/9)x^2 + 3

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