Concept explainers
a.
To find: Equation of line of best fit using graphing calculator.
a.
Answer to Problem 20E
The equation of line of best fit is
Explanation of Solution
Given Information: Table with data values of length and cost.
Calculation:
Inputting the given data in a graphing calculator, results are,
As
Rounding (if needed) and substituting the values,
Thus, the equation of line of best fit is
b.
To interpret: The
b.
Answer to Problem 20E
Model is a good fit for the data. As the length of sailboat increases cost increases.
Explanation of Solution
Given Information: Table with data values of length and cost, graphing calculator results from previous part.
Interpretation:
In the graphing calculator coefficient
c.
To interpret: The slope and
c.
Answer to Problem 20E
Slope signifies an increase of
Explanation of Solution
Given Information: Table with data values of length and cost, graphing calculator results from one of the previous parts.
Calculation:
Interpretation:
As can be seen in graphing calculator screen, slope
Putting
In our case, length of sailboat cannot be
d.
Cost of a sail boat with length of
d.
Answer to Problem 20E
The cost is
Explanation of Solution
Given Information: Table with data values of length and cost, graphing calculator results from one of the previous parts.
Calculation:
Equation is
Putting
Thus, the cost is
e.
To predict: The length of a sailboat that costs
e.
Answer to Problem 20E
The length would be
Explanation of Solution
Given Information: Table with data values of length and cost, graphing calculator results from one of the previous parts.
Calculation:
Equation is
Putting
Thus, the length would be
Chapter 4 Solutions
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