Answer
$m=-\dfrac{1}{5}$
Work Step by Step
Using $m=\dfrac{y_1-y_2}{x_1-x_2}$ or the Slope Formula, then the slope of the line containing the given points, $(
1,8
) \text{ and } (
6,9
)$, is
\begin{array}{l}
m=\dfrac{8-9}{1-6}
\\\\
m=\dfrac{-1}{5}
\\\\
m=-\dfrac{1}{5}
.\end{array}
