The graph shows that from 2000 through 2006, Americans unplugged land lines and switched

Chapter 3, Problem 92

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The graph shows that from 2000 through 2006, Americans unplugged land lines and switched to cellphones. Number of Cellphone and Land-Line Customers in the United States Year 2000 2001 2002 2003 2004 2005 2006 50 100 150 200 250 Number of Customers (millions) Cell Phone Land-line Source: Federal Communications Commission a. Use the graphs to estimate the point of intersection. In what year was the number of cellphone and land-line customers the same? How many millions of customers were there for each? b. The function 4.3x + y = 198 models the number of land-line customers, in millions, x years after 2000.

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