1. 2.3 Introduction to Functions

2. Definition of a Function

3. Domain and Range

4. Ex 1: Determine whether each relation is a function.

5. Solution for part (a) 4 6 8 5 7 8

6. Solution for part (b) 4 5 6 6 7

7. Practice Exercises

8. Answers

9. Function Notation

10. Function Notation

11. Ex 2: Determine whether each equation defines y as a function of x.

12. Solution

13. Solution continued

14. Solution of 2

15. Practice Exercises

16. Answers

17. Ex 3: Evaluating a Function

18. Solution part a.

19. Solution part b.

20. Solution part c.

21. Practice Exercise

22. Answer

23. Piecewise Functions

24. Ex 4: Evaluating a Piecewise Function

25. Solution part a

26. Solution part b

27. Solution part c

28. Practice Exercise

29. Answer

30. Finding a Function’s Domain

31. Finding a Function’s Domain

32. Ex 5: Find the domain of each function

33. Solution part a

34. Solution part b

35. Solution part c

36. Practice Exercises

37. Answers