The following data relate to the advertising expenditure (AE) and corresponding sales revenue (SR) (both in millions of dollars) of a firm for six consecutive years:
AE : 3, 6, 9, 12, 15, 18
SR : 10, 15, 25, 28, 27, 42
- a Create a scatterplot and give your opinion (70 words)
- b Find the equation of the least-squares line and give your opinion. (70 words)
- c Predict SR if AE is 35 and give your opinion. (50 words)
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