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Math Help - Matching a funtion to its traces...?

  1. #1
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    Matching a funtion to its traces...?

    Hi there,
    I need some help on this question. I don't have any clue where to start.
    Thanks!



    Consider the function
    f(x,y)= (2y^3x^2) / (10)

    Which graph below corresponds to the following traces:

    1. The trace for x=0.3
    2. The trace for x=1
    3. The trace for x=1.8



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  2. #2
    MHF Contributor

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    Re: Matching a funtion to its traces...?

    The simplest thing to do is to try each one.

    If x= - 0.3, f(-0.3, y)= (2y^3- .09)/10

    If x= 1, f(1, y)= (2y^3-- 1)/1O

    If x= -1.8, f(-1.8, y)= (2y^3- 3.24)/10

    Now, you might try evaluating at y= 0, y= 1 to see which corresponds to which graph.
    Last edited by HallsofIvy; January 14th 2012 at 05:01 AM.
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  3. #3
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    Re: Matching a funtion to its traces...?

    Thank you! I got it.
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