The slope of a vertical line is (0,1,-1, or 4/5) . The equation of the vertical line passing through (5, 4) is

Question

I am having trouble with setting up the equation to this answer thank you for the help. 

Answer 1

The equation of the vertical line passing through (5, 4) is

 

The line will be a vertical line at x = 5.  y as infinite values if the line is vertical.  The slope is, well, infinite, because the change in y over the change in x (the slope) is not defined since there is no change in x if x is always equal to 5.

I hope I understood your question correctly.