Answer
The graph is shown below.
Work Step by Step
The given inequality is
$x\geq -3$
Graph $x=-3$. Use a solid line because the inequality symbol is $ \geq$.
Test $(0,0)$.
$\Rightarrow x\geq -3$
$\Rightarrow 0\geq -3$
True.
Hence, $(0,0)$ is a solution, shade the half-plane that contains $(0,0)$.