Question 885296
This method may be different than what is expected and maybe this is non-standard, but if you want dy/dx, maybe try to eliminate t?


{{{x=9/t}}}
{{{t/9=1/x}}}
{{{t=9/x}}}
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{{{y=t-t^2}}}
{{{y=9/x-81/x^2}}}----- equation in only x and y.  <b>FIND DERIVATIVE OF THIS?</b>  Find the derivative based on this equation.