Answer
$f(-1)=1$
Work Step by Step
Normally, by tracing the graph, we would get a value for $f(-1)$, as the limit of $\lim\limits_{x \to \ -1}f(x)$ equals to $-1$.
However, the point of $f(-1)$ is defined by the blue dot on the graph, where $x=-1$.
Therefore, according to the graph, the value of $f(-1)=1$
