Question: Music sales In recent years sales of digital music

Music sales: In recent years, sales of digital music ( downloads) have been increasing, while sales of physical units ( CDs, cassettes, and others) have been declining. The following table presents the number of units sold ( in millions) for both digital and physical music formats in each of the years 2007 through 2011.
a. Construct a time- series plot for digital sales. On the same axes, construct a time- series plot for physical sales.
b. Describe the trends in sales for digital and physical music formats.

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  • CreatedSeptember 23, 2015
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