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Math Help - help with stretches and shrinks

  1. #1
    jessier489
    Guest

    help with stretches and shrinks

    I need help with this problem and my book is no help at all. Here is the problem:

    A graph of the given function can be obtained by y=x^2 by both a vertical stretch or shrink and by a horizontal shrink or stretch. Identify the shrink and strech factors:

    y=9x^2

    please help me. thanks
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  2. #2
    Junior Member
    Joined
    Dec 2005
    Posts
    34
    Quote Originally Posted by jessier489
    I need help with this problem and my book is no help at all. Here is the problem:

    A graph of the given function can be obtained by y=x^2 by both a vertical stretch or shrink and by a horizontal shrink or stretch. Identify the shrink and strech factors:

    y=9x^2

    please help me. thanks



    your vertical stretch y'=9y
    and your horizonal is x'=3x
    <only one of them is needed>
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