2.3 Introduction to Functions

Definition of a Function

Domain and Range

Ex 1: Determine whether each relation is a function.

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

Solution for part (b) 4 5 6 6 7

Practice Exercises

Answers

Function Notation

Function Notation

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

Solution

Solution continued

Solution of 2

Practice Exercises

Answers

Ex 3: Evaluating a Function

Solution part a.

Solution part b.

Solution part c.

Practice Exercise

Answer

Piecewise Functions

Ex 4: Evaluating a Piecewise Function

Solution part a

Solution part b

Solution part c

Practice Exercise

Answer

Finding a Function’s Domain

Finding a Function’s Domain

Ex 5: Find the domain of each function

Solution part a

Solution part b

Solution part c

Practice Exercises

Answers