Answer: (−1, 2).
- A (−1, 2)
- B (−2, 1)
- C (1, 2)
- D (−1, 1)
Correct answer: A. (−1, 2)
Explanation: −3 < 2x − 1 < 3 gives −2 < 2x < 4, so −1 < x < 2.
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.