Answer
-12, -6, 0, 5
Work Step by Step
Isolate the variable on one side of the inequality to find the solution.
$\frac{r}{3}\geq-4\longrightarrow$ multiply each side by 3
$\frac{r}{3}\times3\geq-4\times3\longrightarrow$ multiply
$r\geq-12$
-12 is the solution at the endpoint. Any other number that is greater than -12 is also part of the solution set.
