hello
to calculate the slope of the line, we can simply use the formula to calculate slope by using the co-ordiante points
the points are (6, -8) and (6, 2)
[tex]\begin{gathered} x_1=6 \\ y_1=-8 \\ x_2=6 \\ y_2=2 \end{gathered}[/tex][tex]\begin{gathered} \text{slope}=\frac{y_2-y_1}{x_2-x_1} \\ \text{slope}=\frac{2-(-8)}{6-6}=\frac{2+8}{0}=\frac{10}{0}=\text{undefinded} \end{gathered}[/tex]from the calculations above, the slope of the line is undefined