The graph of $f(x)=\sqrt{x} + 3$ is sketched in red and the graph of $g(x)$ is sketched in green. Use the translation rule and $f(x)=\sqrt{x} + 3$ to identify the function $g(x)$;

$g(x)=$You may use sqrt(.) for $\sqrt{.}$, e.g. write sqrt(5) for $\sqrt{5}$.