The highest exponent on this equation is 3, which means that the resulting curve is not a parabola. In addition, $\displaystyle{y}={4}\usepackage{cmbright}\Huge\$ in this equation when $\displaystyle{x}={0}\usepackage{cmbright}\Huge\$ , which does not match the $\displaystyle{y}\usepackage{cmbright}\Huge\$ -intercept of $\displaystyle{\left({0},-{4}\right)}\usepackage{cmbright}\Huge\$ on the graph shown.