The straight up and down line is known as Vertical Line
The y-axis in a coordinate plane is a vertical line
The vertical line is always at 90° to the horizontal line
Using vertical line test, the graph given represents a function as the vertical line drawn intersects the graph at only one point
The line p is a vertical line and q is a horizontal line.
A. 1
B. 0
C. 2
D. 3
Correct Answer: A
Step 1: Only one vertical line can be drawn through a single point