Lesson 1

• Mathematics
• Lower Secondary (Key Stage 3)

Lesson 1

1. £60
2. £75
3. £90
4. £45

1. 3 minutes
2. 4 minutes
3. 5 minutes
4. 6 minutes

Key Points

• There is a standing charge of £30
•  Each month the cost increases by £2

Cost per month = Standing cost + 2 x month selected 

Cost per month = 30 + 2 x m

Cost per month = 30 + 2m

1. A monthly bill of £38 is for 4 mins of calls
2. Every extra minute of calls costs £2
3. A monthly bill for 5 mins of calls costs £40
4. A monthly bill for 2 mins of calls costs £20

1. 24 and 36
2. 28 and 36
3. 28 and 40
4. 28 and 52

0.7 x  distance + 2.8

0.7 x  distance + 2.8

4.9

0.7 x  distance + 2.8

4.9

5.6

0.7 x  distance + 2.8

4.9

5.6

6.3

0.7 x  distance + 2.8

4.9

5.6

6.3

0.7 x  distance + 2.8

4.9

5.6

6.3

Call out fee of £2.20 then 90p per km