Concept explainers
a.
To find: a linear model for the value V of the sedan.
a.

Answer to Problem 41E
Linear model is
Explanation of Solution
Given information: A new 2018 luxury sedan that sold for $41,820 has a book value V .
of $26,765 after 2 years .
Calculation:
Find the slope through the points (0, 41820) and (2, 26765).
The V −intercept is (0, 41820). So the linear model is
b.
To find: an exponential model for the value V of the sedan and round the numbers in the model to four decimal places.
b.

Answer to Problem 41E
Explanation of Solution
Given information: A new 2018 luxury sedan that sold for $41,820 has a book value V .
of $26,765 after 2 years.
Calculation:
Use the point (0, 41820) to find a .
c.
To graph: the two models in the same viewing window.
c.

Answer to Problem 41E
Explanation of Solution
Given information: Given models are
Calculation:
The graph of the two models in the same window is shown below.
d.
To find: which model represents a greater depreciation rate in the first year.
d.

Answer to Problem 41E
The exponential model has a greater depreciation rate in the first year.
Explanation of Solution
Given information:
Calculation:
The exponential model has a greater depreciation rate in the first year.
e.
To find: for what years is the value of the sedan greater using the linear model, the exponential model.
e.

Answer to Problem 41E
Using the graph, the linear model predicts a greater value for almost two full years
(0 < t < 2).
The exponential model predicts a greater value after about two years ( t
Explanation of Solution
Given information:
Calculation:
Using the graph, the linear model predicts a greater value for almost two full years
(0 < t < 2).
The exponential model predicts a greater value after about two years ( t
Chapter 3 Solutions
PRECALCULUS W/LIMITS:GRAPH.APPROACH(HS)
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