These four sections are called quadrants. Quadrants are named using the Roman numerals I, II, III, and IV beginning with the top right quadrant and moving counter clockwise. Ordered pairs within any particular quadrant share certain characteristics. Look at each quadrant in the graph below.
In geometry, a quadrant is one of the four sections of a rectangular coordinate plane. The four quadrants make up the area contained by the x- and y-axes and are labeled I through IV, starting in the upper right quadrant and going counterclockwise, as shown in the figure below.