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Math Help - Dilating the truncus

  1. #1
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    Dilating the truncus

    Simple question. Say I have 1/x^2, and I were to dilate it 'from the y-axis' by a factor of 2 units.
    Do I get 1/2x^2?
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  2. #2
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    Quote Originally Posted by Naur View Post
    Simple question. Say I have 1/x^2, and I were to dilate it 'from the y-axis' by a factor of 2 units.
    Do I get 1/2x^2?
    Sketch the two graphs, does that look right?
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  3. #3
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    I'd say yes. But these 'from y-axis/parallel to y-axis' terms always confuse me.
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  4. #4
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    Quote Originally Posted by Naur View Post
    I'd say yes. But these 'from y-axis/parallel to y-axis' terms always confuse me.
    You want something which is twice as far away from the y at every point.
    Last edited by SimonM; October 20th 2008 at 01:13 AM. Reason: Typo
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  5. #5
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    Oh well that makes it pretty easy doesn't it. So the correct answer would be 2/x^2. Thanks very much
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  6. #6
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    Are you sure?
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