How to Solve Inequalities on Number Lines

The video tutorial guides students through solving an inequality problem using a number line. It explains the significance of filled and open circles, the use of inequality symbols, and the role of absolute value. The instructor demonstrates a process of elimination and testing values to arrive at the correct answer, emphasizing understanding key features of the number line and applying logical reasoning.

What steps did the teacher take to verify if zero is a valid solution for the inequality?

Describe the process of elimination used to narrow down the answer options in the quiz.