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.
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.

Solved Example on x-axis
Which of the following graphs has a point P on the 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.
Related Terms for x-axis
- Coordinate Plane
- Number Line
Additional Links for x-axis