Givens.
The points are (9, -13) and (7, -11).
Use the slope formula.
[tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]Where,
[tex]\begin{gathered} x_1=9,x_2=7 \\ y_1=-13,y_2=-11 \end{gathered}[/tex][tex]m=\frac{-11-(-13)}{7-9}=\frac{-11+13}{-2}=\frac{2}{-2}=-1[/tex]Therefore, the slope is -1.
