1. Warm Up September 2 Tuesday Solve for y. (Rewrite the equation so it says y = …) #1 3 x + y = 15 #2 -2x + 3y = -12

2. Note #4 Set Builder Notation We will discuss how to write set builder notations. I will use both set builder and interval notations to express variables.

3. Set Builder Notation Set- The symbol  means__________________ The symbol  means ________________

4. Suppose we have the set A = {2, 4, 5, 8, 10, 15} Use the correct symbol: 6 ___ A 8_____A

5. How to read it: A = { x | x ≥ 5} A is the set of all x such that x is greater than or equal to 5.

6. #WordsNumber LineSet Builder NotationInterval Notation 1 2 3 4

7. #WordsNumber LineSet Builder NotationInterval Notation 5 6 7 8

8. #WordsNumber LineSet Builder NotationInterval Notation 9 10 11 12