10 20
30
60
80
Time
(min)
2.1.1
Is the above graph an example of direct or indirect proportion?
Give a reason for your answer.
2.1.2
Determine the maximum volume of petrol in the tanker.
2.1.3
(2)
Determine the volume of the petrol that was left in the tanker after 45
minutes.
(2)
2.1.4
Describe the general trend of this graph.
(2)
The relationship between John's Dad's petrol cost and people in the car when he
travels to work in a car is shown below. He spends R50 when he travels alone. His
father approached John for advice on saving on travel. John used the following table:
2
Number of people in car (n)
Dad's petrol cost in Rand (C) 50
3
4
5
25
16.67
12.5
10​