How does a number line help solve an inequality?

A number line visually represents the solutions of an inequality, allowing for a clear understanding of where the solutions lie. By plotting the boundary points and using open or closed circles to indicate whether they are included in the solution set, it helps to illustrate the range of values that satisfy the inequality. This visual aid makes it easier to identify intervals and understand the relationships between numbers in the context of the inequality. Ultimately, it simplifies the process of determining and communicating the solution set.