Graphs 3
2 marks · NormalA car travels at a constant speed. The distance–time graph for its journey shows a straight line from (0, 0) to (3, 180).
a) Calculate the speed of the car in km/h.
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60 km/h (±0.5)
Common mistakes: Mixing up speed and distance.; Incorrect formula application.
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Marking points
M1 · 1 mark · Uses correct formula: speed = distance/time
A1 · 1 mark · Correct answer: 60 km/h
Worked solution
Speed = Distance / Time = 180 km / 3 h = 60 km/h