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2 July, 13:10

The vertex of this parabola is at (3, - 2). When the x-value is 4, the y-value is 3. What is the coefficient of the squared expression in the parabola's equation?

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  1. 2 July, 16:25
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    Hello:

    the parabola's equation is : f (x) = a (x-3) ²-2

    the coefficient of the squared expression in the parabola's equation is : a

    but; f (4) = 3

    3 = a (4-3) ²-2

    a-2=3 ... a=5

    f (x) = 5 (x-3) ²-2
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