A straight line has a slope of 0. How do you write one possible equation that might represent this line? Algebra Graphs of Linear Equations and Functions Horizontal and Vertical Line Graphs 1 Answer Parth S. Dec 11, 2016 #y=1# Explanation: a slope of 0 means a line parallel to x axis 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 3680 views around the world You can reuse this answer Creative Commons License