Answer: An open (hollow) circle at 3.
- A A closed (filled) circle at 3
- B An open (hollow) circle at 3
- C No mark at all
- D An arrow pointing left from 3
Correct answer: B. An open (hollow) circle at 3
Explanation: Since the inequality is strict (x > 3), the point 3 itself is not included, shown with an open circle.
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.