The system used for describing the position of a point in a plane is called Cartesian system.
The horizontal line is called the x-axis (abscissa), and the vertical line is called the y-axis (ordinate).
The coordinate axes divide the plane into four parts called quadrants.
The point of intersection of axes is called the origin.
The distance of a point from y-axis is called x-coordinate or abscissa, and the distance of the point from x-axis is called y- coordinates, or ordinate.
If the abscissa of a point is x and ordinate is y, then (x, y) are called the coordinate of the point.
The coordinate of a point on the x-axis are of the form (x, 0) and that of the point on the y-axis are (0, y)
The coordinates of the origin are (0, 0).
