Correct. Since the graphed line has slope $\displaystyle\frac{{1}}{{2}}\usepackage{cmbright}\Huge\$ (it goes through the points (0, -2) and (2, -1)), any line perpendicular to it will have slope -2 (the opposite reciprocal of $\displaystyle\frac{{1}}{{2}}\usepackage{cmbright}\Huge\$ ).