This equation is the point slope form of the line with slope 5 going through the point (2, -1). The slope of this line is 5, but it does not go through the point (-1, 2) since when $\displaystyle{y}={2},{y}+{1}={3}\usepackage{cmbright}\Huge\$ and when $\displaystyle{x}=-{1},{5}{\left({x}-{2}\right)}={5}{\left(-{3}\right)}=-{15},\usepackage{cmbright}\Huge\$ so $\displaystyle{y}+{1}\ne{5}{\left({x}-{2}\right)}\usepackage{cmbright}\Huge\$ when $\displaystyle{\left({x},{y}\right)}={\left({1},{2}\right)}.\usepackage{cmbright}\Huge\$