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Pearson Algebra 1 Common Core, 2011 View details

1. Inequalities and Their Graphs

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Exercise 24 Page 168

For inequalities on a number line, what does it mean when a point is open or closed?

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To graph an inequality on a number line, we need to make note of two things: the direction of the inequality and whether it is strict. v≥-2 Observing the given inequality, we see that all values of v are greater than or equal to -2. This means that the solution set lies to the right of -2 on a number line. Furthermore, the inequality symbol indicates that v=-2 is a solution, which we will mark with a closed circle on the number line at -2.