Evaluate the Function $f(x)=\sqrt{-3 x}$ , Find $f(-k)$
A) $\sqrt{-3 \mathrm{k}}$ B) $\sqrt{\mathrm{kx}}$

Multiple Choice

Evaluate the function.
-given that $f(x) =\sqrt{-3 x}$ , find $f(-k)$ .

A) $\sqrt{-3 \mathrm{k}}$
B) $\sqrt{\mathrm{kx}}$
C) $\sqrt{3 \mathrm{k}}$
D) $\sqrt{-k x}$