When $\displaystyle{y}={0},{y}\usepackage{cmbright}\Huge\$ is $\displaystyle{0}\usepackage{cmbright}\Huge\$ times $\displaystyle{x}\usepackage{cmbright}\Huge\$ when $\displaystyle{y}=-{4}{x}\usepackage{cmbright}\Huge\$ , y is $\displaystyle-{4}\usepackage{cmbright}\Huge\$ times $\displaystyle{x}\usepackage{cmbright}\Huge\$ .