hello
to find the slope of the line, we need to use formula of a slope
[tex]\begin{gathered} m=\frac{y_2-y_1}{x_2-x_1} \\ y_2=-15 \\ y_1=-16 \\ x_2=-7 \\ x_1=19 \end{gathered}[/tex]now we proceed to insert the points in the equation
[tex]\begin{gathered} m=\frac{y_2-y_1}{x_2-x_1}_{} \\ m=\frac{-15-(-16)}{-7-19} \\ m=\frac{1}{-26} \\ m=-\frac{1}{26} \end{gathered}[/tex]the value of the slope of the line from the given points is -1/26