## College Algebra (11th Edition)

$m=0$
Using $m=\dfrac{y_1-y_2}{x_1-x_2}$ or the Slope Formula, the slope of the line passing through the given points $( -2,4 )$ and $( 6,4 )$ is \begin{array}{l}\require{cancel} m=\dfrac{4-4}{-2-6} \\\\ m=\dfrac{0}{-8} \\\\ m=0 .\end{array}