body{margin:0;} noscript{z-index: 10000; position: fixed; display: block; height: 100%; width: 100%; background: #fff;} noscript .fa{font-size: 40px; display:block; color: #daa520;} noscript div{margin-top: 6%; padding-left: 20px; padding-right: 20px; text-align: center;} ! You must have JavaScript enabled to use this site.

Pearson Algebra 1 Common Core, 2011

PA

Pearson Algebra 1 Common Core, 2011 View details

1. Inequalities and Their Graphs

Continue to next subchapter

Exercise 21 Page 168

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.

y > 2 Observing the given inequality, we see that all values of y are greater than 2. This means that the solution set lies to the right of 2 on a number line. Furthermore, the inequality symbol indicates that y=2 is not a solution, which we will mark with an open circle on the number line at 2.

Subchapter links

Lesson Check p.167

Practice and Problem-Solving Exercises p.168-170

Standardized Test Prep p.170

Mixed Review p.170