Correct. $\displaystyle{x}_{{1}}={10}\usepackage{cmbright}\Huge\$ , $\displaystyle{y}_{{1}}=-{3}\usepackage{cmbright}\Huge\$ , $\displaystyle{x}_{{2}}={8}\usepackage{cmbright}\Huge\$ , and $\displaystyle{y}_{{2}}=-{9}\usepackage{cmbright}\Huge\$

Substitute the values into the slope formula and simplify.

$\displaystyle{m}=\frac{{{y}_{{2}}-{y}_{{1}}}}{{{x}_{{2}}-{x}_{{1}}}}=\frac{{-{9}-{\left(-{3}\right)}}}{{{8}-{10}}}=\frac{{-{6}}}{{-{{2}}}}={3}\usepackage{cmbright}\Huge\$