Question 3 A journey between two towns, Pietermaritzburg and Durban, is exactly 90 km. 3.1 Use a graph (with at least's different speeds in km/h) to model how variation in speed (1) 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 Question 4 LY • (-34 4-4- 3-- • A(22) x X​