The number N (in millions) of cellular phone subscribers
Chapter 1, Problem 1.31(choose chapter or problem)
The number N (in millions) of cellular phone subscribers worldwide is shown in the table. (Midyear estimates are given.) (a) Use the data to sketch a rough graph of N as a function of (b) Use your graph to estimate the number of cell-phone subscribers at midyear in 1995 and 1999
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