Jan wants to rewrite these three equations as logarithmic equations ( $\displaystyle{\log}_{{b}}{x}={y}\usepackage{cmbright}\Huge\$ ).

I $\displaystyle{{9}}^{{0}}={1}\usepackage{cmbright}\Huge\$

II $\displaystyle{{0}}^{{9}}={0}\usepackage{cmbright}\Huge\$

III $\displaystyle{{\left(\frac{{1}}{{9}}\right)}}^{{0}}={1}\usepackage{cmbright}\Huge\$

For which of these three equations will $\displaystyle{y}={0}\usepackage{cmbright}\Huge\$ in the logarithmic equation?