Correct. Each x-value is three times the amount of the corresponding y-value, or each y-value equals the corresponding x-value divided by 3. This tells you that when $\displaystyle{x}={9}\usepackage{cmbright}\Huge\$ , you get $\displaystyle{y}=\frac{{9}}{{3}}={3}\usepackage{cmbright}\Huge\$ . The missing y-value is 3.