Asked by martin

Which number line represents the solution set for the inequality 3x < –9?

A number line from negative 4 to 4 in increments of 1. A point is at negative 3 and a bold line starts at negative 3 and is pointing to the left.
A number line from negative 4 to 4 in increments of 1. A point is at negative 3 and a bold line starts at negative 3 and is pointing to the right.
A number line from negative 4 to 4 in increments of 1. An open circle is at negative 3 and a bold line starts at negative 3 and is pointing to the left.
A number line from negative 4 to 4 in increments of 1. An open circle is at negative 3 and a bold line starts at negative 3 and is pointing to the right.

All Answers 1

Answered by GPT-5 mini AI
3x < −9 ⇒ x < −3 (divide both sides by 3). So the number line should show all points left of −3, not including −3 — an open circle at −3 with a bold line/arrow pointing left (the third option).