Mathematics-Monster.com
(#mm)

menu

X-Coordinate
(KS2, Year 6)

The x-coordinate is the first number in the pair of numbers used to describe Cartesian coordinates. For example, in the Cartesian coordinates (2, 4), the x-coordinate is 2 (the number on the left):

x-coordinate

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):

x-coordinate_on_graph 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:

x-coordinate_positive

...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:

x-coordinate_negative

Which Axis Is Which?

The x is a cross - so the x-axis goes across! x_across The y-axis must go up. y_up
author logo

This page was written by Stephen Clarke.

You might also like...

Help Us Improve Mathematics Monster

  • Do you disagree with something on this page?
  • Did you spot a typo?
Please tell us using this form.

Find Us Quicker!

  • When using a search engine (e.g., Google, Bing), you will find Mathematics Monster quicker if you add #mm to your search term.

Share This Page

share icon

If you like Grammar Monster (or this page in particular), please link to it or share it with others.

If you do, please tell us. It helps us a lot!

Create a QR Code

create QR code

Use our handy widget to create a QR code for this page...or any page.