3. The data in the accompanying table show the growth of cellular phone subscriptions in the U.S. from 1993 to 1999. Year 1993 1995 1996 1997 1999 Subscriptions(millions) 16.00 33.80 44.10 55.30 86.05 a) Fit an exponential curve y = ab* that best fits the data, where x = 0 represents the year 1990 and y is the number of cellular phone subscriber. Approximate a and b to the nearest thousandth. b) Use the model to estimate the number of cellular phone subscriber in 1998.
3. The data in the accompanying table show the growth of cellular phone subscriptions in the U.S. from 1993 to 1999. Year 1993 1995 1996 1997 1999 Subscriptions(millions) 16.00 33.80 44.10 55.30 86.05 a) Fit an exponential curve y = ab* that best fits the data, where x = 0 represents the year 1990 and y is the number of cellular phone subscriber. Approximate a and b to the nearest thousandth. b) Use the model to estimate the number of cellular phone subscriber in 1998.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Transcribed Image Text:### Growth of Cellular Phone Subscriptions in the U.S. (1993-1999)
The table below presents data on the growth of cellular phone subscriptions in the United States from 1993 to 1999.
| Year | Subscriptions (millions) |
|------|--------------------------|
| 1993 | 16.00 |
| 1995 | 33.80 |
| 1996 | 44.10 |
| 1997 | 55.30 |
| 1999 | 86.05 |
#### Questions:
a) **Fit an Exponential Curve:**
- Determine an exponential curve \( y = ab^x \) that best fits the data, where \( x = 0 \) represents the year 1990, and \( y \) is the number of cellular phone subscribers.
- Approximate \( a \) and \( b \) to the nearest thousandth.
b) **Estimation for 1998:**
- Use the model to estimate the number of cellular phone subscribers in 1998.
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Use the data in the accompanying table to find the logarithmic regression equation to the nearest tenth
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