Question 3 A journey between two towns, Pietermaritzburg and Durban, is exactly 90 km 3.1 Use a graph (with at least 5 different speeds in km/h) to model how variation in speed () over the journey causes variation in time taken () to complete the trip. Hint time should be given in minutes 3.2 Describe what happens to y (the time) when x (the speed) increases Is it possible that a vehicle could travel so fast that the trip could be done in no time at all? Give a reason for your answer. 3.4 How does the trend of the graph relate to the question in 3,3? 3.3​