Answer: first quadrant.
- A first quadrant
- B second quadrant
- C third quadrant
- D fourth quadrant
Correct answer: A. first quadrant
Explanation: Both coordinates non-negative describes the first quadrant.
One-variable inequalities use open (excluded) or closed (included) circles on a number line; two-variable inequalities use a dashed (strict) or solid (non-strict) boundary line, with the solution being the entire shaded half-plane on one side of it.
Concept context
Solving linear inequalities in one and two variables algebraically and graphically, and representing solutions on a number line or as a region in a plane.