Answer
$y\leq 30$
The graph is shown below.
Work Step by Step
The given inequality is
$\Rightarrow -0.4y\geq -12$
Divide each side by $-0.4$. Reverse the inequality symbol.
$\Rightarrow \frac{-0.4y}{-0.4}\leq \frac{-12}{-0.4}$
Simplify.
$\Rightarrow y\leq 30$
Hence, the solution is $y\leq 30$.
Use a close circle because $30$ is a solution.
Shade the number line on the left side.