Answer
-3, -9, -12, -1200
Work Step by Step
Isolate the variable on one side of the inequality to find the solution.
$-1\geq\frac{r}{3}\longrightarrow$ multiply each side by 3
$-1\times3\geq\frac{r}{3}\times3\longrightarrow$ multiply
$-3\geq r$
-3 is the solution at the endpoint. Any other number that is less than -3 is also part of the solution set.
