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X-Axis

Definition Of X-Axis

The coordinate plane is formed by the intersection of two number lines, a horizontal number line and a vertical number line. The horizontal number line is called the x-axis.

More About X-Axis

The equation of x-axis is y = 0
The y-coordinate or ordinate of every point on x-axis is equal to 0

Examples of X-Axis

The figure shows the coordinate plane formed by the intersection of the x- and y- axes.
Their point of intersection is called the origin. 
Examples of x-axis

Video Examples: Where Does a Line Cross the X or Y Axis

Solved Examples on X-Axis

Ques: Which of the following graphs has a point P on the x-axis?

Solved Examples on x-axis

Choices:

A. Graph 1
B. Graph 2

Correct Answer: B

Solution:

Step 1: The coordinate plane is formed by the intersection of two number lines, a horizontal number line and a vertical number line. The horizontal number line is called the x-axis
Step 2: Graph 2 has the point P on the horizontal line i.e., on the x-axis.

Ques: Which of the following points lie on x-axis?

Choices:

A. (1, 1)
B. (1, 0)
C. (0, 1)
D. (-1, -1)
Correct Answer: B

Solution:

Step 1: We know that, y-coordinate or ordinate of every point on x-axis is equal to 0
Step 2: Therefore, among the ordered pairs given (1, 0) lies on x-axis