## Precalculus (6th Edition)

$y$
RECALL: The graph of the function $y=f(-x)$ involves a reflection about the y-axis of the parent function $f(x)$. The parent function of the given function is $y=\sqrt{x}$. The given function is in the form $y=f(-x)$. Therefore, the given function involves a reflection about the y-axis of the parent function $y=\sqrt{x}$.