4. Writing and Graphing Inequalities
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For inequalities on a number line, what does it mean when a point is open or closed?
x ≥ - 3 12 Observing the given inequality, we see that all values of x are greater than or equal to - 3 12. This means that the solution set lies to the right of - 3 12 on a number line. Furthermore, the inequality symbol indicates that x = - 3 12 is a solution, which we will mark with a closed circle on the number line at - 3 12.