Sarah draws a graph to show the amount of fuel in her delivery van on a 240 km journey.
| Distance travelled (km) | Fuel (litres) |
|---|---|
| 0 | 48 |
| 40 | 42 |
| 80 | 36 |
| 120 | 30 |
| 160 | 24 |
| 200 | 18 |
| 240 | 12 |
A line graph showing the relationship between distance travelled (km) on the x-axis and fuel (litres) on the y-axis. The x-axis ranges from 0 to 300 with major grid lines every 50 units and minor grid lines every 10 units. The y-axis ranges from 0 to 60 with major grid lines every 10 units and minor grid lines every 2 units. A straight line starts at (0,48)(0, 48)(0,48) and ends at (240,12)(240, 12)(240,12).
How much fuel was in Sarah's van at the start of her journey?
How many more kilometres can the van travel before it runs out of fuel?
What assumption have you made to calculate your answer to (b)?
