Correct. The four y-values are $\displaystyle{{8}}^{{0}}\usepackage{cmbright}\Huge\$ , $\displaystyle{{8}}^{{1}}\usepackage{cmbright}\Huge\$ , $\displaystyle{{8}}^{{2}}\usepackage{cmbright}\Huge\$ , and $\displaystyle{{8}}^{{3}}\usepackage{cmbright}\Huge\$ , which in turn are equal to 1, 8, 64, and 512.