To find the slope we use the formula
[tex]m=\frac{y2-y1}{x2-x1}[/tex]where (x2,y2) is a right point from (x1,y1)
on this case (-1,5) is (x2,y2) and (-3,-1) is (x1,y1)
then replacing
[tex]\begin{gathered} m=\frac{(5)-(-1)}{(-1)-(-3)} \\ \\ m=\frac{6}{2}=3 \end{gathered}[/tex]The slope of the line is 3
