Answer
$x=-\sqrt{y}$
.
Work Step by Step
Using one of the parametric equations, express t in terms of one variable.
$y=t\Rightarrow\quad t=y$
Substitute it into the other equation.
$x=-\sqrt{t} \Rightarrow\quad x=-\sqrt{y}$
To graph, create a function value table using values for t, in ascending order of t, calculating the x- and y-coordinates of points on the graph.
Plot and join the points obtained with a smooth curve, noting the direction in which t increases.
