1. Ch 2ABC 2A: Relations and Functions 2B: Function Notation 2C: Domain and Range

2.  Charges for parking a car in short-term car park at an airport are shown in the table below. The total charge is dependent upon the length of time t the car is parked.  How much for 1 hour? 2A: Relations and Functions

3. Relations

4.  A relation is any set of points which connect two variables.  Relations are often expressed as equations connecting the variables x and y in a Cartesian plane.  Example of relations that are not equations: Relations

5.  A function sometimes called a mapping is a relation in which no two different ordered pairs have the same x-coordinate or first component.  Testing for a function  Geometric Test or Vertical Line test Function

6.  A function sometimes called a mapping is a relation in which no two different ordered pairs have the same x-coordinate or first component.  Testing for a function  Geometric Test or Vertical Line test Function

7. 2B: Function Notation

8.  Use set notation for Cartesian planes: 2C: Domain and Range

9.  Number Line Graphs Domain and Range

10. More!

11. Example