Table below shows advertisement investment and the sales volume of different brands of Soda Media Expense (M) Sales Volume 150 2000 90 1400 60 800 55 550 40 540 30 530 10 220   Draw a scatter diagram and investigate the relationship between media expense an sales volume. Develop a regression relation between sales volume and media expenses. Estimate the confidence limit for sales volume at a media expense of 40 M. What would the sales volume at an ad expense of 70M?

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