
Concept explainers
a.
The linear function to model the price of the car with respect to age.
a.

Answer to Problem 19PPS
Explanation of Solution
Given:
The table:
Concept Used:
Equation of the line passing through the points
Calculation:
From the given table is clear that the value of the car with age 2 years is 15924.96 dollars and the value of the car with age 3 years is 14113.29 dollars.
The rate of change of a line between two points is given by the slope of the line.
So, the slope of the linear function to model the price of the car with respect to age is
So, the equation of the line passing through
Thus, the linear function that models the price of the car with respect to age is
b.
To interpret the meaning of the slope of the line.
b.

Answer to Problem 19PPS
The value of the car is decreasing at a rate of
Explanation of Solution
Given:
The table:
Concept Used:
Equation of the line passing through the points
Calculation:
The slope of the line is
c.
The average retail price for a 7-year old car.
c.

Answer to Problem 19PPS
Explanation of Solution
Given:
The table:
Concept Used:
Equation of the line passing through the points
Calculation:
In order to find the average retail price for a 7-year old car, substitute
Thus, the average retail price for a 7-year old car is
Chapter 3 Solutions
Algebra 1
Additional Math Textbook Solutions
Pre-Algebra Student Edition
A First Course in Probability (10th Edition)
College Algebra with Modeling & Visualization (5th Edition)
Elementary Statistics: Picturing the World (7th Edition)
Algebra and Trigonometry (6th Edition)
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