## Precalculus (10th Edition)

1) $x=t; y=t^3,-\infty\lt t\lt \infty$ 2) $x=-t; y=-t^3,-\infty\lt t\lt \infty$
We are given the rectangular equation: $y=x^3$ One set of parametric equations is: $\begin{cases} x=t\\ y=t^3 \end{cases}$ with $-\infty\lt t\lt \infty$ Another set of parametric equations is: $\begin{cases} x=-t\\ y=-t^3 \end{cases}$ with $-\infty\lt t\lt \infty$