8. A famous company selling household appliances wants to determine the relationship between advertising expenditures and sales. The following data was taken from 6 major sales regions. The expenditure is in thousands of pounds and sales are in millions of pounds.
(a) Estimate the linear regression line to provide a chart and summary statistics together with the coefficients.
(b) Estimate the expected sales for a region where 7.3 thousand pounds are being spent on advertising.
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