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 18E
Equation of the line of best fit is
Explanation of Solution
Given Information: Data values of day,
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: The
b.
Answer to Problem 18E
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 18E
Slope is positive and is 1.
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
Chapter 4 Solutions
BIG IDEAS MATH Algebra 1: Common Core Student Edition 2015
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