The parabola in the graph is not narrow enough for the $\displaystyle{a}{{x}}^{{2}}\usepackage{cmbright}\Huge\$ term to be as high as $\displaystyle{10}{{x}}^{{2}}\usepackage{cmbright}\Huge\$ . The other terms in the trinomial are also incorrect. In the linear equation, the slope of $\displaystyle\frac{{1}}{{2}}\usepackage{cmbright}\Huge\$ does not correspond to the steep incline of the line on the graph.