The following table shows worldwide sales and projected sales of a certain type of phone and their average selling prices in 2020, 2022, and 2024. Year 2020 2022 2024 Selling Price ($100) p 6 5 4.5 Sales (billions) q 1 1.2 1.3 Find the regression line. q(p) = Use the regression line to estimate the demand (in millions of units sold) when the selling price was $250. 1.6 X million

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