This is a graph of the equation $\displaystyle{y}={\left|\frac{{1}}{{2}}{x}\right|}\usepackage{cmbright}\Huge\$ . Notice that the graph of any quadratic function, like $\displaystyle{y}={3}{{x}}^{{2}}-{4}\usepackage{cmbright}\Huge\$ , will be a parabola.