1. A relation is a set of ordered pairs. Think of all the students in our class and think of their heights… Pairing their name and their height is a relation. 2.1 Relations & Functions

2. The set of all the starting points is called the domain, and The set of all the ending points is called the range. The domain is what you start with; the range is what you end up with. Domain vs. Range

3. Domain & Range State the domain and range of each. 1.{(1, 3), (3, -2), (6, 0), (2, 4)} 2.

4. Domain & Range State the domain and range of each. 3. 4.

5. A relation is any set of ordered pairs. Functions vs. Relations

6. Foldable! Each student will receive a foldable. Use your scissors to cut along the dotted lines. You are ENCOURAGED to use highlighters, m a r k e r s, and colored pencils in this foldable!!!

7. State the domain and range of each relation. Then determine whether each relation is a function. Practice 1. 2.

8. State the domain and range of each relation. Then determine whether each relation is a function. Practice 3. 4.

9. State the domain and range of each relation. Then determine whether each relation is a function. Practice 5. 6.

10. State the domain and range of each relation. Then determine whether each relation is a function. Practice

11. Function Notation

12. Normal Notation Function Notation

15. You Try

16. Function Notation

17. Homework Lesson 2.1 2.1 Worksheet