Question

$x=\frac{1}{8}y^{2}$
the directrix of the parabola is
○ $y=-2$
○ $x=-2$
○ $x=2$

Explanation:

Step1: Rewrite to standard parabola form

$$y^2 = 8x$$

Step2: Identify parabola parameters

For $y^2=4px$, $4p=8 \implies p=2$

Step3: Find directrix equation

Directrix: $x = -p$

Answer:

B. $x=-2$