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26 February, 19:08

A parabola opening up or down has vertex (0, 3) and passes through (-10, - 2). Write its

equation in vertex form.

Simplify any fractions.

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Answers (1)
  1. 26 February, 19:30
    0
    y = - 1/20x^2 + 3.

    Step-by-step explanation:

    The vertex form is:

    y = a (x - 0) ^2 + 3

    When x = - 10 y = - 2, so:

    -2 = a (-10) ^2 + 3

    -2 = 100a + 3

    100a = - 5

    a = - 1/20.
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