Quadrants by signs of coordinates for JEE

Formula

\[\text{I}: (x>0,y>0),\quad \text{II}: (x<0,y>0),\quad \text{III}: (x<0,y<0),\quad \text{IV}: (x>0,y<0)\]

Variables: \(x,y\) are coordinates of a point.

Conditions: Point not lying on axes.

Sign-based geometry, graph interpretation, region problems.