Concept explainers
(a)
To find: The linear model for the data with the help of regression of graphing utility.
(a)
Answer to Problem 25E
The linear model for the data is equal to
Explanation of Solution
Given information:
The table shows the advertising expenditures
Month | Advertising expenditures, | Sales volume, |
Calculation:
For the regression linear model of data follow the steps below:
First press the
Go to
Now enter the keystrokes
Figure(1)
Therefore, the linear model for the data is equal to
(b)
To find: The graph of model and the
(b)
Answer to Problem 25E
The model is not the best fit for the data as all the points of the data doesn’t lie on the graph of the model.
Explanation of Solution
Given information:
The table shows the advertising expenditures
Month | Advertising expenditures, | Sales volume, |
Calculation:
To graph the points on scatter plot, follow the steps using graphing calculator.
First press the
Go to
Now press the key
Now, press the
Figure (2)
(c)
To find: Interpretation of slope of the model in context of the problem.
(c)
Answer to Problem 25E
The slope of the model is equal to
Explanation of Solution
Given information:
The table shows the advertising expenditures
Month | Advertising expenditures, | Sales volume, |
Calculation:
As found in part(a), the model for the best fit of data is equal to
Compare it with general equation of line
Therefore, the slope of model as
(d)
To find: The sales for the advertising expenditures of
(d)
Answer to Problem 25E
The sales for the advertising expenditures of
Explanation of Solution
Given information:
The table shows the advertising expenditures
Month | Advertising expenditures, | Sales volume, |
Calculation:
As found in part(a), the model for the best fit of data is equal to
Substitute
Therefore, the sales for the advertising expenditures of
Chapter 1 Solutions
EBK PRECALCULUS W/LIMITS:GRAPH.APPROACH
- 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