Is the feasible region of $x + y \ge 3$, $x \le 4$, $y \le 5$, $x \ge 0$, $y \ge 0$ bounded?

Explanation

1. 01

   $x \le 4$ and $y \le 5$ keep every point inside the box $0 \le x \le 4$, $0 \le y \le 5$.

2. 02

   $x + y \ge 3$ only cuts off the corner near the origin, so the region is a bounded polygon.