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4 quadrants Cartesian plane

The Cartesian plane is composed of two perpendicular axes. Their intersection defines the origin of the plane. Each axis is graduated starting from the origin. 

  • The horizontal axis is the abscissa axis (also known as the "x axis"),
  • The vertical axis is the ordinate axis (also known as the "y axis").

These axes divide the cartesian plane into four quadrants.

A point is located in the Cartesian plane by its abscissa "x" and its ordinate "y".  Together in this order, (x , y) constitutes the coordinates of the point.