Identify which of the following are integers, and then plot those integers on the number line.

2.5, $\displaystyle-{1.7}\usepackage{cmbright}\Huge\$ , $\displaystyle-{1}\usepackage{cmbright}\Huge\$ , $\displaystyle{0}\usepackage{cmbright}\Huge\$ , $\displaystyle\frac{{1}}{{2}}\usepackage{cmbright}\Huge\$ , 2, $\displaystyle-{2}\usepackage{cmbright}\Huge\$