Concept explainers
a.
To graph: The given model and the
Given:
The model is
Model | Weight(lb) | Fuel Economy(mpg) |
Focus | 2952 | 40.45 |
Fusion | 3472 | 33.21 |
Mustang | 3531 | 33.07 |
Edge | 3912 | 31.40 |
Escape | 4439 | 26.18 |
Calculation:
Press the Y= key on a graphing calculator to enter the function.
Press the STAT key to enter the data into list 1 and list 2.
Set the graphing window.
Press the 2nd key followed by Y= key to obtain the scatter plot.
Press the GRAPH key to obtain the graph and scatter plot on the same window.
b.
To find: The fuel economy that can be obtained by reducing the weight of a car whose current weight is 3200 lb. by 100 lb.
The fuel economy improves by 1.2 mpg.
Given:
The model is
Model | Weight(lb.) | Fuel Economy(mpg) |
Focus | 2952 | 40.45 |
Fusion | 3472 | 33.21 |
Mustang | 3531 | 33.07 |
Edge | 3912 | 31.40 |
Escape | 4439 | 26.18 |
Concept used:
Calculate the fuel economy with the original weight and then with the reduced weight to compare the fuel economy.
Calculation:
The model is
Substitute 3200 for
Substitute 3100 for
Determine the change in fuel economy.
Conclusion: The fuel economy improves by 1.2 mpg.
Chapter 2 Solutions
PRECALCULUS:GRAPHICAL,...-NASTA ED.
- 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