VERTICAL LINE
Definition of Vertical Line
The straight up and down line is known as Vertical Line
More About Vertical Line
 The yaxis in a coordinate plane is a vertical line
 The vertical line is always at 90^{o} to the horizontal line
Example of Vertical Line

Using vertical line test, the graph given represents a function as the vertical line drawn intersects the graph at only one point
Video Examples: Vertical Line Test

Using vertical line test, the graph given does not represent a function as the Vertical line drawn intersects the graph at more than one point
Solved Example on Vertical Line
Ques: How many vertical lines can be drawn through a single point?
Choices:
A. 1B. 0
C. 2
D. 3
Correct Answer: A
Solution:

Step 1: Only one vertical line can be drawn through a single point
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