The coordinate consist of two axis, name x axis and y axis.
The x axis is horizontal and y axis is vertical. The point where both axis intersect is called origin and coordinates of origin is (0,0).
If you move towards left of origin then x coordinate is negative and y is 0 and if you move towards right the x xoordinate is postive and y coordinate is 0.
Simillarly for upside movemenr y is positive and x is 0 and for down sdie movement y is begative and y is 0.
The coordinate can be represented as,