A line goes through the points (3, 1) and (4, 3). The calculation of its slope is started below. Finish the calculation.

$\displaystyle{m}=\frac{{{y}_{{2}}-{y}_{{1}}}}{{{x}_{{2}}-{x}_{{1}}}}=\frac{{{3}-{1}}}{{{4}-{3}}}\usepackage{cmbright}\Huge\$

The slope of the line is _____.