# X-Coordinate

## X-Coordinate

Position of a point on a number line.

The first element in an ordered pair of the coordinates of a point, which represents the position on the horizontal axis of the Cartesian coordinate system

### Examples

In the diagram below, the position of the point indicated by the blue arrow is $$700$$.

In this Cartesian plane, the x-coordinate of point $$A$$ is 6.

### Educational Note

In a Cartesian plane in two-dimensional geometric space, the horizontal axis is called the x-axis.

### Etymological Note

From the Latin abscissus meaning “cut-off line” It is said that Isaac Newton used the term “x-coordinate” in 1686 and Blaise Pascal used the term “y-coordinate” in the same period. Some authors attribute the introduction of the terms “x-coordinate” and “y-coordinate” to Gottfried Wilhelm Leibniz (1646-1716) in 1692.