Answer: (2, 2).
- A (5, 5)
- B (2, 2)
- C (6, 0)
- D (0, 8)
Correct answer: B. (2, 2)
Explanation: At (2,2): x-y=0<=2 true, x+y=4<=6 true. Both satisfied. Check (5,5): x+y=10>6 fails.
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.