Answer: 3x + 2y > 6.
- A x<sup>2</sup> + y <= 4
- B 3x + 2y > 6
- C xy < 10
- D x<sup>3</sup> - y >= 0
Correct answer: B. 3x + 2y > 6
Explanation: 3x + 2y > 6 has both variables to the first power only, making it linear.
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.