The x-coordinate is the first number in the pair of numbers used to describe Cartesian coordinates.
For example, in the Cartesian coordinates

Please tell us using

**(2, 4)**, the x-coordinate is**2**(the number on the left):## What Does the X-Coordinate Mean?

The x-coordinate tells you how far**across**the horizontal x-axis a point is on a graph (measured from the origin). If a point has Cartesian coordinates**(2, 4)**, the point would be**2**units along the x-axis. The image below shows what we mean by a point being 2 units along the x-axis (measured from the origin):**Note:**The x-axis is labelled with numbers (0, 1, 2, 3...) so you can measure how far across the point is.## The X-Coordinate Can Be Positive...

If you go**right**along the x-axis (starting at the origin, where it crosses the y-axis), it is labelled with positive numbers (0, 1, 2, 3...). The x-coordinate of any point to the**right**of the y-axis is**positive**. Imagine a point had an x-coordinate of**4**. It would be**4**units to the**right**of the y-axis:## ...Or the X-Coordinate Can Be Negative

If you go**left**along the x-axis (starting at the origin, where it crosses the y-axis), it is labelled with negative numbers (0, −1, −2, −3...). The x-coordinate of any point to the**left**of the y-axis is**negative**. Imagine a point had an x-coordinate of**−4**. It would be**4**units to the**left**of the y-axis:## Which Axis Is Which?

The**x is a cross**- so the**x-axis goes across**! The y-axis must go up.## You might also like...

graphs and coordinate geometryunderstanding Cartesian coordinatesunderstanding the y-coordinatedrawing a point from Cartesian coordinates

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