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28 April, 16:51

The vertex of this parabola is at (5, 5). when the x-value is 6, they-value is - 1. what is the coefficient of the squared expression in the parabola's equation?

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  1. 28 April, 16:53
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    hello:

    the parabola's equation is : f (x) = a (x-5) ²-5

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

    but; f (6) = - 1

    - 1 = a (6-5) ²+5

    a+5=-1 ... a=-6

    f (x) = - 6 (x-5) ²+5

    so : a = - 6
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