The following table shows the number of US cell phone subscribers in millions for years since 1995. Year # susbscribers 0 33.786 1 44.043 2 55.312 3 69.209 4 86.047 5 109.478 6 128.375 140.766 158.722 182.14 207.896 233.041 255.396 300- Let C'(t) be the number of US cell phone subscribers in millions in t years since 1995. A linear model for the data is C(t) = 18.997t +17.711. 250- 200 150- 100- 7 8 9 10 11 12 13 14 15 50- 270.334 285.646 302.859 6 3 Use the above scatter plot to decide whether the linear model fits the data well. O The function is not a good model for the data O The function is a good model for the data. 9 12 Estimate the number of subscribers in 2012. millions Use the model to predict the year in which the number of subscribers will be 350 million.

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