1. How did I get here so quickly??
What day is it?
How did I get here so quickly??
Lesson 2 -

2. DOMAIN
AND
RANGE

3. Objectives
I can write the domain and range of any function in inequality(set builder) notation or interval notation.

4. Finding Domain & Range Given:
Discrete graphs – you just LIST the domain and range (don’t repeat and list in order from least to greatest)
Continuous graphs – use interval notation (least, greatest)

5. Find the Domain and Rangex y -4 1 -6 2 -8 3

6. Find the Domain and Rangex y 12 -4 15 -6 16

7. Set Notation Uses:
Is used when there is a open dot or the number is NOT included on the graph.
Is used when there is a closed dot or when the number is included on the graph.
Is used when one number is excluded.

8. Domain and Range: Graph

9. Domain and Range: Graph

10. Domain and Range: Graph
Special case: When there is an open circle and closed circle on the same number – go with the closed circle.

11. Domain and Range: Graph

12. Domain and Range: Graph

13. Domain and Range: Graph

14. Interval of Increase, Interval of Decrease, & Constant Graphs
To find where the graph is increasing and decreasing, trace the graph with your finger from left to right.
Specify the x-values!

15. Interval of increase:
Interval of decrease:

16. Interval of increase:
Interval of decrease: