Four Quadrants on a Graph 

We know that the two axes X and Y divided the plane into four sections.

These four sections are called the Quadrants (one fourth section).

The plane is called Cartesian plane or Coordinate plane or the XY plane. 

The plural of axis is axes.

The quadrants are labelled with Roman numbers as,

First  quadrant – I

Second quadrant – II

Third quadrant – III

Fourth quadrant – IV

I Quadrant – The first quadrant is located at the upper right section of the plane.

II Quadrant – The second quadrant is located at the upper left section of the plane.

III Quadrant – The third quadrant is located at the bottom left section of the plane.

IV Quadrant – The fourth quadrant is located at the bottom right section of the plane.