Answer
$\text{Set Builder Notation: }
\{y|y\lt-3\}
\\\text{Interval Notation: }
(-\infty,-3)$
Work Step by Step
The given inequality, $
y\lt-3
,$ can be written in the following formats:
\begin{array}{l}\require{cancel}
\text{Set Builder Notation: }
\{y|y\lt-3\}
\\\text{Interval Notation: }
(-\infty,-3)
.\end{array}
Note that in the interval notation, use parentheses for $\lt$ or $\gt.$ Use a bracket for $\le$ or for $\ge.$
In the graph, a hollowed dot is used for $\lt$ or $\gt.$ A solid dot is used for $\le$ or $\ge.$