a.
To graph: The number N
t | 1996 | 1998 | 2000 | 2002 | 2004 | 2006 |
N | 44 | 69 | 109 | 141 | 182 | 233 |
a.
Explanation of Solution
Given information:
The number N
t | 1996 | 1998 | 2000 | 2002 | 2004 | 2006 |
N | 44 | 69 | 109 | 141 | 182 | 233 |
Graph:
The graph of N vs t can be drawn by using t as x-axis and N as y-axis. The obtained graphs is as like this,
Interpretation:
The obtained graph shows that the number of US cellular phone subscribers are continuously increasing from 1996 to 2006.
b.
To calculate: The estimation of the number of cell-phone subscribers at midyear in 2001 and 2005, Using the given graph.
b.
Answer to Problem 21E
The estimated numbers of cell-phone subscribers at the midyear 2001 are 125 millions and at the midyear 2005 are 207.5 millions.
Explanation of Solution
Given information:
The number N
t | 1996 | 1998 | 2000 | 2002 | 2004 | 2006 |
N | 44 | 69 | 109 | 141 | 182 | 233 |
Calculation:
Consider the given graph, the year 2001 lies in between 2000 and 2002 on the x-axis. Now, take the corresponding value of y with respect to x as 2001, it is find out to be 125 on this graph.
Similarly, the year 2005 lies in between 2004 and 2006 on the x-axis. Now, take the corresponding value of y with respect to x as 2005, it is find out to be 207.5 on this graph.
Therefore, the estimated numbers of cell-phone subscribers at the midyear 2001 are 125 millions and at the midyear 2005 are 207.5 millions.
Chapter 1 Solutions
Single Variable Calculus: Concepts and Contexts, Enhanced Edition
- Calculus: Early TranscendentalsCalculusISBN:9781285741550Author:James StewartPublisher:Cengage LearningThomas' Calculus (14th Edition)CalculusISBN:9780134438986Author:Joel R. Hass, Christopher E. Heil, Maurice D. WeirPublisher:PEARSONCalculus: Early Transcendentals (3rd Edition)CalculusISBN:9780134763644Author:William L. Briggs, Lyle Cochran, Bernard Gillett, Eric SchulzPublisher:PEARSON
- Calculus: Early TranscendentalsCalculusISBN:9781319050740Author:Jon Rogawski, Colin Adams, Robert FranzosaPublisher:W. H. FreemanCalculus: Early Transcendental FunctionsCalculusISBN:9781337552516Author:Ron Larson, Bruce H. EdwardsPublisher:Cengage Learning