This diagram is based on data for the weekend revenue based on the number of screens Fig 1. Relationship between number of screens and revenue Em 45 40 35 30 25 Revenue in million E 20 15 10 5 0 450 500 650 550 600 Number of screens 700 a) What is the name of this type of diagram? (2 marks) b) What do the diagram and correlation coefficient suggest about the relationship between the two theatre sub-sector variables (4 marks) c) Explain the meaning of an outlier giving one particular example here