Math Dictionary / X-Axis
X-Axis
The x-axis is the horizontal number line on the coordinate plane.
GeometryGrade 5Grade 6Grade 7Grade 8Algebra 1GEDSATACT
What it means
It helps locate the x-coordinate of a point.
Also called: horizontal axis
Examples
| The x-axis runs left and right |
| Points on the x-axis have y = 0 |
| The origin lies on the x-axis |
Common mistake
The x-axis is horizontal; the y-axis is vertical.
Try one
Question: What is the y-coordinate of any point on the x-axis?
Show answer
It is 0.