A coordinate system is also known as coordinate geometry; it is used to determine the position of several points or other geometric elements on a given space using a set of numbers.
A set of numbers is used to identify the location of a point on a given plane or dimension. These numbers are also referred to as coordinates.
The intersection of its axes determines the cartesian coordinate system. A 2D plane has the coordinates (0,0) for the origin.
Write the x-coordinate first, followed by the y-coordinate. So, for example, the x coordinate always comes first, followed by the y coordinate.