Answer
$3$
Work Step by Step
Find the corresponding value of $g(1)$ on the graph since we are plugging the corresponding value of $g(1)$ into $f(x)$ and finding the corresponding value of $f(g(x))$ on the graph as well.
$g(1)=-5$
$f(-5)=3$
$f(g(x))=f(g(1))=f(-5)=3$