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23 August, 12:29

The vertex of this parabola is at (-2,-3). When the y value is - 2 the x value is - 5 what is the coefficient of the squared term in the parabola equation

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  1. 23 August, 12:54
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    Y=a (x-h) ^ + k

    so your parabola has an equation of:

    y=a (x+2) ^ - 3

    -2=a (5+2) ^ - 3

    -2=a (-3) ^-3

    -2=9a-3

    adding them to both sides

    1=9a

    divide both sides:

    1=9a

    Divide both sides by 9:

    a=1/9

    the vertex form is:

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

    The expanded form is:

    y = (1/9) x^ + (4/9) x - (23/9)

    Anw: E. (1/9)
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