## Elementary Algebra

$m=-\dfrac{6}{5}$
Using $m=\dfrac{y_1-y_2}{x_1-x_2}$, the slope of the line determined by the given points, $( 2,8 ) \text{ and } ( 7,2 ),$ is \begin{array}{l}\require{cancel} m=\dfrac{8-2}{2-7} \\\\ m=\dfrac{6}{-5} \\\\ m=-\dfrac{6}{5} .\end{array}