O-LevelMathematicsAlgebra and graphs4024/12 · May/June 2021 · Q125 Marks
Lara goes for a cycle ride. The distance-time graph shows her journey. [Figure 12.1] Calculate Lara's average speed, in kilometres per hour, for the whole journey.
- (a)Lara goes for a cycle ride. The distance-time graph shows her journey. [Figure 12.1] Calculate Lara's average speed, in kilometres per hour, for the whole journey.[3]
- (b)A car travels at a constant speed of 10m/s for 80 seconds. It then decelerates at a constant rate of 0.5 m/s² until it stops. On the grid, draw the speed-time graph for this journey. [Figure 12.2][2]
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Mark scheme
Marking points from the official mark scheme (May/June 2021). The mark or mark type is shown in brackets.
- [3] (a) 16 nfww
- [3] (a) B1 for [total distance = ] 24 used or [total time = ] 1.5 hours oe used
- [3] (a) M1 for figs 24 ÷ their total time
- [2] (b) Correct graph
- [2] (b) B1 for line from (0, 10) to (80, 10)
- [2] (b) B1FT for line from their (80, 10) with gradient -0.5
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