Q.Graphical solution set of the inequations $x \geq 0$ and $y \leq 0$ lies in ______ quadrant.

A feasible solution satisfies every constraint and $x,y\ge0$ at once; the set of all feasible solutions is the feasible region, the overlap of the constraint half-planes (usually in the first quadrant). Its corner points are where two boundary lines meet, found by solving them in pairs. A region is bounded if it fits inside a finite circle (typically from $\le$ constraints) and unbounded if it runs to infinity (typically from $\ge$ c …