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Step-by-step explanation:
Vertical Line
In a coordinate plane, a line parallel to the Y-axis is called Vertical Line. It is a straight line which goes from top to bottom and bottom to top. Any point in this line will have the same value for the x-coordinate. For example, (2,0), (3,0) (-4,0), etc. are the points of vertical lines. Similarly, the line which goes from left to right and is parallel to the x-axis is called a horizontal line.
The vertical lines have no slope. It goes parallelly along with y-axis and hence the slope is not defined. Therefore, the equation of the vertical line which crosses the x-axis at any point say ‘a’, is given by:
x = a
where x is the coordinate of a point on the line and ‘a’ is the point where the lines cross the x-intercept. See the below image to understand the difference between vertical and horizontal lines.
Vertical and Horizontal Line