A market study found that the sales for a firm were related to advertising expenditure, as follows: Advertising Expenditure (Kshs ‘000’) Sales (Kshs ‘000’) 0 13 1 16 2 14 3 22 4 17 5 21 6 26 Required...

1. A market study found that the sales for a firm were related to advertising expenditure, as follows:

Required

1. Draw a scatter diagram with the line of best fit to show the relationship.

1. Determine the regression line equation for estimating the sales for a given level of advertising expenditure


2. What is the estimated sale in thousand, if no advertising expenditure is incurred?