Answer: ac > bc.
- A ac > bc
- B ac < bc
- C ac = bc
- D ac + bc = 0
Correct answer: A. ac > bc
Explanation: Multiplying by a negative number reverses the inequality, so ac > bc.
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.