Question

2a
for international calls, dodgi mobile charges $2.70 per minute plus a connection fee of $0.50.
complete the table of values.

call length (minutes)

international call cost (dollars)

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1

3.20

2

5.90

3

$square$

4

$square$

5

$square$

Explanation:

Step1: Define cost formula

Let $m$ = call length (minutes), $C$ = total cost.
$C = 0.50 + 2.70m$

Step2: Calculate cost for 3 minutes

Substitute $m=3$ into formula:
$C = 0.50 + 2.70\times3 = 0.50 + 8.10 = 8.60$

Step3: Calculate cost for 4 minutes

Substitute $m=4$ into formula:
$C = 0.50 + 2.70\times4 = 0.50 + 10.80 = 11.30$

Step4: Calculate cost for 5 minutes

Substitute $m=5$ into formula:
$C = 0.50 + 2.70\times5 = 0.50 + 13.50 = 14.00$

Answer:

Call length (minutes)	International Call cost (dollars)
2	5.90
3	8.60
4	11.30
5	14.00