Note #1 FUNCTION

• We will discuss the characteristics of functions and definitions of domain and range.

• I will decide if a relation is a function or not and explain.

Definition Facts/Characteristics

Examples Non-Examples

Word

FUNCTION

4 Different Representation of a Function:

SET NOTATION GRAPH

TABLE MAPPING

A function is like a vending machine!

INPUT

OUTPUT

Domain vs. Range

Domain Range

#1 Set Notation

{(-2,3),(-1, 7),(0,-1),(7,6)}

#2 Graphx

y

(-2,3)(-1,7)(0,-1)(7,6)

Vertical Line Test (Pencil Test)

y

x

y

x