Coordinates

Coordinates are numbers that define the position of a point. The word comes from  co- ‘together’ and the  Latin word ordo meaning ‘order’. The word coordinate comes from words meaning ‘order together’.

Coordinates can be one or more numbers.

If a coordinate is one number it defines the position of a point on a line.

Below are three examples:

Here 0 defines the position of a point on a line.

0 is also called the origin because it is where coordinates are measured from.

Here is the point at position 2. It is 2 from the origin.

Coordinates use negative numbers as well. Here -3 denotes the position.