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Based off of the standard form of a parabola how do you know if it opens down or uo

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  1. 20 May, 04:34
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    If the coefficient of x^2 is positive it opens upwards. Negative coefficient of x^2 downwards
  2. 20 May, 04:46
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    The standard form of a parabola is y=ax²+bx+c,

    If the coefficient "a" is positive (a>0) the parabola is open up

    and if a<0 (negative) it opens down
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