The following table shows worldwide sales of a type of phone and their average selling prices in 2012, 2013, and 2017. Year 2012 2013 2017 Selling Price p ($100) 4 3 2 Sales q (billions) 0.7 1 2 Find the regression line (round coefficients to one decimal place). Use the regression line to estimate the demand (in millions of units sold) when the selling price was $320.

A First Course in Probability (10th Edition)
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ISBN:9780134753119
Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Demand for Smartphones   The following table shows worldwide sales of a type of phone and their average selling prices in 2012, 2013, and 2017.
Year 2012 2013 2017
Selling Price p ($100) 4 3 2
Sales q (billions) 0.7 1 2
Find the regression line (round coefficients to one decimal place).
Use the regression line to estimate the demand (in millions of units sold) when the selling price was $320.
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