Answer
$9\leq y$
Work Step by Step
$-5\geq-\frac{5}{9}y\longrightarrow$ multiply both sides by $-\frac{9}{5}$; reverse the inequality sign
$-5\times-\frac{9}{5}\leq-\frac{5}{9}y\times-\frac{9}{5}\longrightarrow$ multiply
$9\leq y$
Check the endpoint.
$-5\overset?=-\frac{5}{9}(9)$
$-5=-5\checkmark$
Check the inequality.
$-5\overset?\geq-\frac{5}{9}(18)$
$-5\geq-10\checkmark$
Since 9 is included in the solution, the endpoint of the graph is a solid circle.
