The point $\displaystyle{\left({0},{2}\right)}\usepackage{cmbright}\Huge\$ is the y-intercept of the line, so $\displaystyle{b}={2}\usepackage{cmbright}\Huge\$ . The slope, m, is 1. Substituting these values into the equation $\displaystyle{y}={m}{x}+{b}\usepackage{cmbright}\Huge\$ , you find $\displaystyle{y}={x}+{2}\usepackage{cmbright}\Huge\$ .