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Math Help - Parametric equations

  1. #1
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    Parametric equations

    How would I go about finding the equation in x and y for the curve given by the parametric equations x=e[neg. t power], y=-2t, t in R?
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by mike1 View Post
    How would I go about finding the equation in x and y for the curve given by the parametric equations x=e[neg. t power], y=-2t, t in R?
    I will assume you mean:

    x=e^(-t), y=-2t

    then:

    ln(x)=-t, which we may substitute inro the second equation to get:

    y=2 ln(x)

    or:

    y=ln(x^2).

    RonL
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