Warm Up September 2 TuesdaySolve for y. (Rewrite the equation so it says y = …)

#1 3 x + y = 15

#2 -2x + 3y = -12

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.

Set Builder Notation

• Set-

The symbol means__________________

• The symbol means ________________

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

8_____A

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.

# Words Number Line Set Builder Notation Interval Notation

1

2

3

4

# Words Number Line Set Builder Notation Interval Notation

5

6

7

8

# Words Number Line Set Builder Notation Interval Notation

9

10

11

12