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Math Help - Derivative

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    Derivative

    I'm blanking out here. If I had dx/dt, dy/dt, how would I find dy/dx? Is it as simple as just dividing the two out?
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  2. #2
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    Quote Originally Posted by yuropod View Post
    I'm blanking out here. If I had dx/dt, dy/dt, how would I find dy/dx? Is it as simple as just dividing the two out?
    It's a combination of the fact that \frac{dt}{dx} = \frac{1}{\frac{dx}{dt}} and the chain rule, namely that \frac{dy}{dx} = \frac{dy}{dt}\,\frac{dt}{dx}.

    So yes, you DO "divide it out", but that's not really the right language to use.
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