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16 April, 08:47

The vertex of this parabola is at (-3, - 1). When the y-value is 0, the x-value is 4. What is the coefficient of the squared term in the parabola's equation?

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  1. 16 April, 12:06
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    Hello:

    the parabola's equation is : f (x) = a (x+3) ²-1

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

    but; f (4) = 0

    0 = a (4+3) ²-1

    49a-1=0 ... a=1/49

    f (x) = 1/49 (x-3) ²-2
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