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.
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.
Chapter5: Exponential And Logarithmic Functions
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Transcribed Image Text: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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