The table shows the number of digital albums downloaded per year and the
number of CDs sold by manufacturers per year. What relationship exists between
the two sets of data? Predict the number of CDs sold and the number of albums
downloaded in 2010. Explain your reasoning.
Year
2004
2005
2006
2007
Music Sales
Albums
Downloaded
(millions)
4.6
13.6
27.6
42.5
CDs Sold
(millions)
767
705.4
619.7
511.1