You may not have recognized that the end point of the solution is a closed circle, so $\displaystyle-{6}\usepackage{cmbright}\Huge\$ is included in the inequality. Also, the points on the graph are to the left, so they represent numbers that are less than $\displaystyle-{6}\usepackage{cmbright}\Huge\$ . The correct answer is $\displaystyle{x}\le-{6}\usepackage{cmbright}\Huge\$ .