Answer
$\text{Set Builder Notation: }
\{x|x\lt3\}
\\\text{Interval Notation: }
(-\infty,3)$
Work Step by Step
The given graph of inequality can be described in the following formats:
\begin{array}{l}\require{cancel}
\text{Set Builder Notation: }
\{x|x\lt3\}
\\\text{Interval Notation: }
(-\infty,3)
.\end{array}