Big Ideas Math Integrated I, 2016
BI
Big Ideas Math Integrated I, 2016 View details
1. Writing and Graphing Inequalities
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Exercise 7 Page 56

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

Practice makes perfect
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.

b > -8 Observing the given inequality, we see that all values of b are greater than -8. This means that the solution set lies to the right of -8 on a number line. Furthermore, the inequality symbol indicates that b=- 8 is not a solution, which we will mark with an open circle on the number line at -8.