Answer
See below
Work Step by Step
The equation in standard form: $y^2=-2x$
Identify the focus, directrix, and axis of symmetry. The equation has the form $y^2=4px$ where $p=-0.5$. The focus is $(-0.5,0)$. The directrix is $x =-p=0.5$. Because $y$ is squared, the axis of symmetry is the x-axis.
Find some values and plot points:
$x=-1 \rightarrow y=\pm 1.41\\x=-2 \rightarrow y=\pm 2\\x=-3 \rightarrow y=\pm 2.45\\x=-4 \rightarrow y=\pm 2.83\\x=-5 \rightarrow y=\pm 3.16$