Solved: Modeling Data The table shows the numbers of cellular phone subscribers (in
Chapter 1, Problem 68(choose chapter or problem)
The table shows the numbers of cellular phone subscribers (in millions) in the United States for selected years. (Source: CTIA-The Wireless)
(a) Use the regression capabilities of a graphing utility to find a mathematical model of the form \(y=a t^{2}+b t+c\) for the data. In the model, \(y\) represents the number of subscribers (in millions) and \(t\) represents the year, with t = 5 corresponding to 1995.
(b) Use a graphing utility to plot the data and graph the model. Compare the data with the model.
(c) Use the model to predict the number of cellular phone subscribers in the United States in the year 2020.
Text Transcription:
y = at^{2} + bt + c
y
t
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