Envision Math 2.0: Grade 6, Volume 1
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Envision Math 2.0: Grade 6, Volume 1 View details
7. Solve Inequalities
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Exercise 17 Page 221

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 non-strict.

p<3 Observing the given inequality, we see that all values of p are less than 3. This means that the solution set lies to the left of 3 on a number line. Furthermore, the inequality symbol indicates that p=3 is not a solution, which we will mark with an open circle on the number line at 3.