Question $9$

Eliminate the parameter $in$ the equation $x=t^2,y=t^4.$

$y=2x^2$ for $x0$

$y=x^2$ for $x0$

$y=\sqrt[\phantom{2}]{x}$ for $x0$

$y=\sqrt[\phantom{2}]{2x}$ for $x0$

Question $10$

Eliminate the parameter $in$ the equation $x=5tant$ and

$y=4sect$ over the interval $0t2.$

$\frac{x^2}{25}-\frac{y^2}{16}=1$ for $xin-x$

$\frac{y^2}{16}+\frac{x^2}{25}=1$ for $xin-x$

$\frac{y^2}{16}-\frac{x^2}{25}=1$ for $xin-x$

$y=x^2-9$ for $xin-3x3$