The slope between two points is given by:
[tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]Plugging the values of the points given we have:
[tex]\begin{gathered} m=\frac{-7-(-7)}{4-(-7)} \\ =\frac{-7+7}{4+7} \\ =\frac{0}{11} \\ =0 \end{gathered}[/tex]Therefore the slope is 0.