The line in the graph is horzontal and slope of a horizontal line is 0.
Determine the slope of perpendicular line as product of slope of perpendicular line is -1.
![\begin{gathered} m=-(1)/(0) \\ =\text{undefined} \end{gathered}]()
The slope is undefined means line is vertical and passing through the point (2,6). So equation of line is,
Answer: x = 2