The following information relates to total maintenance costs of machine hours used a production process for a period of 12 months. Month Hours used Maintenance cost (y) 1500 1950 900 900 2700 2250 1950 2100 1350 1050- 1800 1350 Using the least square method determine; Correlation coefficient 1 2 3 4 5 6 7 8 9 10 11 12 90 150. 60 30 180 150 120 180 -90 30 120 60 (i) (ii) Coefficient of determination (iii) Interpret your answer (ii) above. (5 marks) (3 marks) marks) (2