Answer
$\text{Set Builder Notation: }
\{x|x\lt-1\}
\\\text{Interval Notation: }
(-\infty,-1)$
Work Step by Step
The given graph shows all the numbers that are less than $-1.$ Hence, the given graph of inequality can be described in the following formats:
\begin{array}{l}\require{cancel}
\text{Set Builder Notation: }
\{x|x\lt-1\}
\\\text{Interval Notation: }
(-\infty,-1)
.\end{array}