A coach provides a small line graph showing weekly total training distance for a cyclist over five weeks: Week 1 = 40 km, Week 2 = 44 km, Week 3 = 48 km, Week 4 = 52 km, Week 5 = 58 km. Describe the trend over these five weeks and give one possible coaching reason for that trend. Answer in full sentences.
(Total for Question 14 is 2 marks)