The end point of the solution is an open circle at $\displaystyle{4}\usepackage{cmbright}\Huge\$ , so $\displaystyle{4}\usepackage{cmbright}\Huge\$ is not included in the inequality. The points on the graph are to the left, so they represent numbers that are less than $\displaystyle{4}\usepackage{cmbright}\Huge\$ . This is the graph of the inequality $\displaystyle{x}<{4}\usepackage{cmbright}\Huge\$ .