1. ©G Dear 2010 – Not to be sold/Free to use
Mobile
Phone Plans
Applied Mathematic
(Preliminary General 1)
Cost Graphs
for Mobiles
Stage 6 - Year 11
Press Ctrl-A
©G Dear 2010 – Not to be sold/Free to use

2. But after that you must pay!
Cost of Calls Graphs (1/
$49 cap - $400 of calls
Connection 37c
and 40c per 30 sec.
Minutes =
( ) ÷ 80c
40 000c
- 37c
= 500 minutes
= 8 hr 20 min
But after that you must pay!

3. Cost of Calls Graphs (1/ $49 cap - $400 of calls Connection 37c
and 40c per 30 sec.
$0.40
$0.80
$1.20
$1.60
2.00
2.40
$2.80
$3.20
$3.60 1
1.5 2
2.5 3
3.5 4
4.5
minutes
Cost
4 minutes =
c x 4 min
= 357c
= $3.57
End of
Slide

4. Cost of Calls Graphs (1/ $49 cap - $400 of calls Connection 37c
and 40c per 30 sec.
4 minutes = $3.57
$0.40
$0.80
$1.20
$1.60
2.00
2.40
$2.80
$3.20
$3.60 1
1.5 2
2.5 3
3.5 4
4.5
minutes
Cost
End of
Slide

5. How much does a 2.5 minute call cost?
Cost of Calls Graphs (1/
$49 cap - $400 of calls
How much does a 2.5 minute call cost? 40 80
1.20
1.60
2.00
2.40
2.80
3.20
3.60 1
1.5 2
2.5 3
3.5 4
4.5
minutes
Cost
$2.15
End of
Slide

6. How much does a 3 minute call cost?
Cost of Calls Graphs (1/
$49 cap - $400 of calls
How much does a 3 minute call cost?
$0.40
$0.80
$1.20
$1.60
2.00
2.40
$2.80
$3.20
$3.60 1
1.5 2
2.5 3
3.5 4
4.5
minutes
Cost
$2.60
End of
Slide

7. How much does a 1.7 minute call cost?
Cost of Calls Graphs (1/
$49 cap - $400 of calls
How much does a 1.7 minute call cost? 40 80
1.20
1.60
2.00
2.40
2.80
3.20
3.60 1
1.5 2
2.5 3
3.5 4
4.5
minutes
Cost
$1.70
Round Up to
2 min.
End of
Slide