1. Quick Questions 1)Sketch a graph with a negative gradient and a y-intercept of 1. 2)Solve for x: 3x +7 =5x-1 3)If Fred is twice Annies age, and Annie is 4 years older than Bill, who is 1 year younger than 7 year old Tommy. Find Fred’s age

2. Define the Communications Key Words Cap Plan Data allowance Pre-paid plan Post-paid plan

3. Cap Plan: A ‘cap’ plan consists of a predetermined amount, usually for a specified value of calls/messages/data, with any usage above this predetermined amount incurring additional charges Data allowance: The amount of data that can be sent or received on your mobile device without incurring additional charges

4. Pre-paid plan: Credit is put onto the phone to allow a specific amount of usage Post-paid plan: A contract is signed determining a minimum monthly spend. The bill is paid at the conclusion of the billing period.

5. Telstra Phone Bill Example What is the total of the bill? For what period are the call charges? How much of the bill is for service and equipment?

7. Using the sample Telstra bill, answer the following: How much is due in this bill? When is the due date? How much GST is included? What was the total for the previous bill? List three payment options for this bill. Does the total add up? What is the difference between the “Total New Charges” on page 2 and the “Total Due” at the bottom of the page? Why is this? What late fee can you incur if you fail to pay your bill on time?

8. Answers How much is due in this bill? $80.13 When is the due date? 11/02/08 How much GST is included? $7.28 What was the total for the previous bill? $145.00 List three payment options for this bill. Telstra shop, Easy Pay, Phone/Internet, Bpay, PostBillpay, Post Does the total add up? yes What is the difference between the “Total New Charges” on page 2 and the “Total Due” at the bottom of the page? Why is this? $0.005 and they have rounded to the nearest cent What late fee can you incur if you fail to pay your bill on time? $15.00

9. Exercise 14A Complete all questions