Correct. The solution to $\displaystyle{y}\ge{3}{x}+{1}\usepackage{cmbright}\Huge\$ is given by regions 1 and 4. The solution to $\displaystyle{y}\le-{x}+{2}\usepackage{cmbright}\Huge\$ is given by regions 3 and 4. The solution to the system is the overlap of these regions. This is region 4.