1. Intro to Inequalities Unit 4 Section 4.1

2. Definition A statement that a mathematical expression is greater than or less than another expression.

3. Symbols < less than ≤ less than or equal to > greater than ≥ greater than or equal to

4. Solutions Your solution can be represented as an inequality with a shaded number line, interval notation, and in words. The solution indicates all number sets that make the inequality true. For example, what does the solution to x < 2 look like?

5. Graphing If you are graphing a “less than” or “greater than” you are not including the number in your solution. This is shown with an open circle on the number line, or a parentheses when using interval notation.

6. Graphing If you are graphing a “less than or equal to” or a “greater than or equal to” you are including the number in your solution. This is shown with a closed circle on the number line, or a bracket when using interval notation.

7. Reading and graphing an inequality

8. Reading and graphing inequality

9. Interval Notation Graph the following inequalities and also express the answer in interval notation.