Concept explainers
a.
The solution of the least square regression line for the data.
a.
Answer to Problem 54E
Explanation of Solution
Given information:
A store manager wants to know the demand for a product as a function of the price. The table shows the daily sales
Calculation:
The system of the equations are:
Multiplying the first equation by
Multiplying the second equation by
Adding the two equations and solving for the variable
Substitute the value of
Substitute the value of
Thus, the solution is
b.
The solution of the system of equations by graphically.
b.
Answer to Problem 54E
Explanation of Solution
Given information:
A store manager wants to know the demand for a product as a function of the price. The table shows the daily sales
Calculation:
The system of the equations are:
Byusing a graphing utility the two equations are as shown below:
Thus, the solution is
c.
The demand by using thelinear model from part (a).
c.
Answer to Problem 54E
Explanation of Solution
Given information:
A store manager wants to know the demand for a product as a function of the price. The table shows the daily sales
Calculation:
By using the linear model from part (a) to predict the demand when the price is
Substitute the value of
Therefore, when the price is at
Chapter 7 Solutions
EBK PRECALCULUS W/LIMITS
- 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