The equation of a line passing through the point $(-2,0)$, and perpendicular to the line whose slope is -2 is

Question

$\begin{array}{1 1} (a)\;y= \large\frac{x}{2}+\frac{1}{2} \\ (b)\;y= \large\frac{-x}{2}+\frac{1}{2} \\ (c)\;y= \large\frac{x}{2}+1 \\(d)\;y= \large\frac{x}{2}+1 \end{array} $