Chapter 2 - Solving Linear Inequalities - 2.1 - Writing and Graphing Inequalities - Exercises - Page 59: 38

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The equation will represent all numbers greater than $-2$ including that. Hence, a solid mark is made at number $-2$ which denotes that $-2$ is included. The numbers to the right of $-2$ is marked with blue. The blue line represents the solution for the inequality $n \geq-2$.