This is a graph of the equation $\displaystyle{y}=\frac{{1}}{{2}}{{x}}^{{2}}-{4}\usepackage{cmbright}\Huge\$ . Notice that the coefficient of the $\displaystyle{{x}}^{{2}}\usepackage{cmbright}\Huge\$ term in $\displaystyle{y}=-\frac{{1}}{{2}}{{x}}^{{2}}+{4}\usepackage{cmbright}\Huge\$ is negative; how does that affect the graph of the parabola?