Ans: D
$g(x)=2f(x)$ means $f(x)$ is enlarged along $y$-axis $2$ times. The $x$ intercepts will not be changed and the $y$ intercept is doubled from $-2$ to $-4$.
$g(x)=2f(x)$ means $f(x)$ is enlarged along $y$-axis $2$ times. The $x$ intercepts will not be changed and the $y$ intercept is doubled from $-2$ to $-4$.
