A line goes through the points (4, 2) and (5, 6). The calculation of its slope is started below. Finish the calculation.

$\displaystyle{m}=\frac{{{y}_{{2}}-{y}_{{1}}}}{{{x}_{{2}}-{x}_{{1}}}}=\frac{{{6}-{2}}}{{{5}-{4}}}\usepackage{cmbright}\Huge\$

The slope of the line is _____.