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Math Help - how to graph??

  1. #1
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    Exclamation how to graph??

    hey, i was just wondering how I would graph these equations step by step. I have a quiz on them tomorrow and I can't figure them out.

    1) y = x(squared)(multiplied by)e(to the x)

    2) y = (lnx)(squared)

    thanks for your help
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  2. #2
    Site Founder MathMan's Avatar
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    Here are the above questions using Latex:

    1.  y=x^2e^x

    2.  y= \ln{x^2}
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  3. #3
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    Quote Originally Posted by wynd90
    hey, i was just wondering how I would graph these equations step by step. I have a quiz on them tomorrow and I can't figure them out.
    What do you have to work with? For example, a calculator, a log table, etc.
    Last edited by paultwang; May 19th 2005 at 08:50 PM.
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  4. #4
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    nothing to use

    hey, i have nothing to use except a scientific calculator and a piece of paper
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  5. #5
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    Great, you have a calculator.

    MathMan, I think
    y = (lnx)(squared)
    means y=(ln \, x)^2

    You need x-intercept, y-intercept, extrema (you might not get all three because some functions do not have some), and a few points. You must know the domain (x-range) so you know what to plot. Ask, or determine yourself.

    1. Find those by hand or by a calculator... just plug x into the function. A calculator produces a much better estimate for the points.
    2. Plot them.
    3. Connect the dots as smoothly as possible.
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