Answer
$b\leq-\frac{1}{6}$
Work Step by Step
$18b\leq-3\longrightarrow$ divide both sides by 18
$18b\div 18\leq-3\div18\longrightarrow$ divide
$b\leq -\frac{1}{6}$
Check the endpoint.
$18(-\frac{1}{6})\overset?=-3$
$-3=-3\checkmark$
Check the inequality.
$18(-{1})\overset?\leq-3$
$-18\leq-3\checkmark$
Since $-\frac{1}{6}$ is included in the solution, the endpoint of the graph is a solid circle.
