The use of one-way pagers declined as cell phones became
Chapter , Problem 11.7.24(choose chapter or problem)
The use of one-way pagers declined as cell phones became more popular.22 The number of users is given in Table 11.34 and plotted in Figure 11.72, along with a quadratic regression function. (a) How well does the graph of the quadratic function fit the data? (b) Find a cubic regression function. Does it fit better? Table 11.34 Year 1990 1991 1992 1993 1994 1995 Users, millions 10 12 15 19 25 32 Year 1996 1997 1998 1999 2000 Users, millions 38 43 44 43 37 5 10 10 20 30 40 50 , years since 1990 , users (millions) Figure 11.72
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