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Math Help - plz help me

  1. #1
    Junior Member
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    Exclamation plz help me

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  2. #2
    MHF Contributor
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    Re: plz help me

    You are asked to find a-b+c. For what value of x will y = a-b+c? You want the coefficient of b to be -1, so try x = -1. Plugging that in, you get y = a(-1)^2 + b(-1) + c = a-b+c. So, looking at the graph, what is the value for y when x = -1? That will be your answer.
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