The number N (in millions) of cellular phone subscribers worldwide is shown in the table. (Midyear estimates
Question:
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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