What is the slope of the line x=2? Algebra Graphs of Linear Equations and Functions Horizontal and Vertical Line Graphs 1 Answer bp Apr 17, 2015 Slope is undefined. Slope of all vertical lines is undefined. Answer link Related questions What are horizontal or vertical line graphs? What would the (x,y) table look like for a horizontal and a vertical line graph? How do you graph y=4? What are some examples of when you would see horizontal or vertical line graphs? How do you graph x=-1? What is the equation for the x-axis? What is the equation for the y-axis? How do you graph y=1/2? How do you graph x=100? In which quadrant do the lines x=3 and y=-4 intersect? See all questions in Horizontal and Vertical Line Graphs Impact of this question 9804 views around the world You can reuse this answer Creative Commons License