Kerry currently pays \$50 a month for her internet service. She is planning to switch to a fibre optic cable service.
Write an equation for the total cost T of Kerry's current internet service over a period of n months.
For the fibre optic cable service, Kerry pays a one-off amount of \$1200 for the installation costs and then a monthly fee of \$25. Write an equation of the total cost T of Kerry's new internet service over n months.
Complete the table for the total cost of the current internet service, given by T = 50 n:
| n | 1 | 6 | 12 | 18 | 24 |
|---|---|---|---|---|---|
| T (\text{ dollars}) |
Complete the table of values for the total cost of the fibre optic cable service, given by T = 25 n + 1200
| n | 1 | 6 | 12 | 18 | 24 |
|---|---|---|---|---|---|
| T (\text{ dollars}) |
Graph the lines for the total cost of Kerry's current internet service and the total cost of her new internet service on a number plane.
Using your graph to determine how many months it will take for Kerry to break even on her new internet service.