select 2 points from the triangles that form the line
it can be point A=(-6,-2) and ponint E=(3,1)
use the formula for the slope
[tex]\begin{gathered} m=\frac{y2-y1}{x2-1} \\ \end{gathered}[/tex]
replace the values
[tex]\begin{gathered} m=\frac{1-(-2)}{3-(-6)} \\ m=\frac{3}{9}=\frac{1}{3} \end{gathered}[/tex]
the slope for the line shown is 1/3
