In a coordinate plane, the intersection of the $x\text{-}$axis and the $y\text{-}$axis produces four regions called quadrants. The quadrants are numbered counterclockwise from the top right quadrant as Quadrant I to Quadrant IV in the bottom right.

The signs of the coordinates of a point can be determined based on which quadrant the point lies in.

Conversely, the quadrant of a point can be found by looking at the signs of its coordinates. Points on an axis do not belong to any quadrant.