Co-ordinates are a way of describing a location. In co-ordinate systems, the locations are usually described as points. Points can be defined as an ordered pair that consists of two numbers which represent the distance from the origin in a certain direction.
In mathematics, co-ordinates are used to find an unknown point on a graph or map by using two known points. The first number in a point is called the x-coordinate and it tells you how far from the origin you are going right or left. The second number is called the y-coordinate and it tells you how far up or down you are going near to or away from the origin respectively.