Chapter 9 Quadratic Relations and Conic Sections - 9.2 Graph and Write Equations of Parabolas - 9.2 Exercises - Skill Practice - Page 623: 17

See below

The equation in standard form: $3y^2=-24x\\y^2=-8x$ Identify the focus, directrix, and axis of symmetry. The equation has the form $y^2=4px$ where $p=-2$. The focus is $(-2,0)$. The directrix is $x =-p=2$. Because $y$ is squared, the axis of symmetry is the x-axis. Find some values and plot points: $x=-1 \rightarrow y=\pm 2.83\\x=-2 \rightarrow y=\pm 4\\x=-3 \rightarrow y=\pm 4.899\\x=-4 \rightarrow y=\pm 5.66\\x=-5 \rightarrow y=\pm 6.32$