Vertical lines are strong and rigid. They can suggest stability, especially when thicker. Vertical lines accentuate height and convey a lack of movement, which is usually seen as horizontal. They stretch from the earth to the heavens and are often connected with religious feelings.
What is special about a vertical line?
In a vertical line, all the points on the line has the same x coordinate. This means that we'll get a run of 0. Since in mathematics, if you divide by 0, you'll get the answer of "undefined", then the slope of a vertical line is also "undefined".
What does a straight line symbolize?
Whether lines are drawn or appear in nature, they represent various states of mind, including: Horizontal lines indicate a sense of motionless rest and peace. Vertical lines are seen as tall and represent grandeur.