This is a graph of $\displaystyle{y}={3}{{x}}^{{2}}-{4}\usepackage{cmbright}\Huge\$ . Notice that the y-intercept is at $\displaystyle{\left({0},-{4}\right)}\usepackage{cmbright}\Huge\$ , and the point $\displaystyle{\left({1},-{1}\right)}\usepackage{cmbright}\Huge\$ makes the equation a true statement: $\displaystyle-{1}={3}{{\left({1}\right)}}^{{2}}-{4}\usepackage{cmbright}\Huge\$ .