Answer
Vertex: $\quad (0,0)$
Focus: $\quad (-4,0)$
Directrix: $\quad x=4$
Work Step by Step
One variable is squared, the other is not: parabola.
$y^{2}=-4(4)x$
Table 1:
$\begin{array}{lll}
{\text { Vertex }}&{\text{Focus}}&{\text{Directrix}}&{\text{Equation}}\\\hline
{(0,0)}&{(-a,0)}&{x=a}&{y^{2}=-4ax}\end{array}$
$a=4$
Vertex: $\quad (0,0)$
Focus: $\quad (-4,0)$
Directrix: $\quad x=4$
