Question

The function rule C = 40n + 210 relates the number of months n to cost in dollars C of a phone plan and budget phone. Make a table of the input/output pairs to show the cost of the phone and phone plan after 2, 12 and 24months

(Please help. I need this)

Answer 1

Input - Output

2 - $290

12 - $690

24 - $1170

Explanation:

Cost after n months:

The cost after n months is given by the following function:

`C(n) = 40n + 210`

After 2 months:

This is C(2). So

`C(2) = 40(2) + 210 = 80 + 210 = 290`

After 12 months:

This is C(12). So

`C(12) = 40(12) + 210 = 480 + 210 = 690`

After 24 months:

This is C(24). So

`C(24) = 40(24) + 210 = 960 + 210 = 1170`

Table:

Input - Output

2 - $290

12 - $690

24 - $1170