[tex]\begin{gathered} \text{The given coordinates is as follows:} \\ x_1=-6,y_1=9,x_2=7,y_2=-9 \\ \text{The formula for slope of the line is as follows:} \\ m=\frac{y_2-y_1_{}}{x_2-x_1} \\ m=\frac{-9-9}{7+6} \\ m=\frac{-18}{13}(\text{Ans)} \end{gathered}[/tex]
