Concept explainers
a.
To write: An equation of line of best fit for given data and to further graph the points and plot the line.
a.
Answer to Problem 19E
Equation of the of line of best fit is
Explanation of Solution
Given Information: Data values of mileage,
Calculation:
Entering the data and using the linear regression feature in the graphing calculator,
As
Thus, equation of line of best fit is
Graph:
b.
To identify and interpret: The
b.
Answer to Problem 19E
Data values have
Explanation of Solution
Given information: Graphing calculator display from the previous part.
Interpretation:
From the graphing calculator display in the previous part it can be inferred that
c.
To interpret: The slope and
c.
Answer to Problem 19E
Slope is negative.
Line of best fit crosses the
Explanation of Solution
Given Information: Graphing calculator display from previous part.
Interpretation:
From the graphing calculator display shown in part
d.
To approximate: Mileage of automobile with cost
d.
Answer to Problem 19E
The mileage would be
Explanation of Solution
Given Information: Cost is
Interpretation:
Substituting the value
Thus, the mileage would be
e.
To predict: Price of automobile with given mileage.
e.
Answer to Problem 19E
Cost would be
Explanation of Solution
Given Information: Mileage is
Interpretation:
Substituting the value
Thus, the cost would be
Chapter 4 Solutions
Big Ideas Math A Bridge To Success Algebra 1: Student Edition 2015
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