The end point of the solution is a closed circle at $\displaystyle-{4}\usepackage{cmbright}\Huge\$ , so $\displaystyle-{4}\usepackage{cmbright}\Huge\$ is included in the inequality. The points on the graph are to the right, so they represent numbers that are greater than $\displaystyle-{4}\usepackage{cmbright}\Huge\$ . This is the graph of the inequality $\displaystyle{x}\ge-{4}\usepackage{cmbright}\Huge\$ .