Answer
Please see the graph.
Work Step by Step
$x=-y$
Let $x=0$
$x=-y$
$0=-y$
$-1*0 = -1*-y$
$0 = y$
$(0,0)$ (x-intercept and y-intercept)
Let $x=-2$
$x=-y$
$-2=-y$
$-2*-1=-y*-1$
$2 = y$
$(-2,2)$
Let $x=3$
$x=-y$
$3=-y$
$3*-1= -1*-y$
$-3 = y$
$(3,-3)$