Answer
$D.$
Work Step by Step
Axis of symmetry is parallel to the y-axis, opens down.
According to Table 2,
Equation: $\quad (x-h)^{2}=-4a(y-k)\quad $
With $\quad (h,k)=(0,0)$,
we look for $\quad x^{2}=-4ay$ ... choice $D.$
Testing the point$\quad $ ($-2,-1):$
$(-2)^{2}=-4(-1)\quad $... yes.
