Apex Group of Companies consist of five subsidiaries. All the subsidiaries carry out

CSR projects under massive budgets.However,the Group Finance Manager states that

CSR expenditure does not have any influence on their group's market share. To

evaluate this statement, following data has been collected.

CSR expenditure ($'000) 3.2 3.8 2.6 1.9 1.6

No. of customers ('000) 490.52 520.74 470.86 390.63 410.05

(i) Calculate the coefficient of determination, and Evaluate the applicability of the

Finance Manager's statement.

(ii) Obtain the simple linear regression model which would fit the above data.

(iii) If Apex is planning to spend $4,800 of CSR expenditure in the next year,

Forecast the number of customers based on the model derived in part (ii).