Concept explainers
(a)
The linear model approximation.
(a)

Answer to Problem 78E
There is high linear co- relation.
Explanation of Solution
Given information:
The linear model approximation is shown below,
Formula used:
The x −axis represent the horizontal axis and the y-axis represent the vertical axis.
Calculation:
In the following graph, the value of y decreases with the increase in the value of x
It can be seen from graph that data follows a linear model well. Hence there is high linear co- relation.
Conclusion:
There is high linear co- relation.
(b)
The linear model approximation.
(b)

Answer to Problem 78E
The data represents a parabola shape, hence there is no co-relation.
Explanation of Solution
Given information:
The linear model approximation is shown below,
Formula used:
The x −axis represent the horizontal axis and the y-axis represent the vertical axis.
Calculation:
Consider the following graph
In the given graph data represents a parabola shape, hence there is no co-relation.
Conclusion:
The data represents a parabola shape, hence there is no co-relation.
(c)
The linear model approximation.
(c)

Answer to Problem 78E
There is moderate co-relation.
Explanation of Solution
Given information:
The linear model approximation is shown below,
Formula used:
The x −axis represent the horizontal axis and the y-axis represent the vertical axis.
Calculation:
Consider the following graph
In the above graph value of y decreases with increase in value of x
The data follows a linear model but at some point there is deviation from linear model, hence there is moderate co-relation.
Conclusion:
There is moderate co-relation.
(d)
The linear model approximation.
(d)

Answer to Problem 78E
There is high linear co- relation.
Explanation of Solution
Given information:
The linear model approximation is shown below,
Formula used:
The x −axis represent the horizontal axis and the y-axis represent the vertical axis.
Calculation:
Consider the following graph
In the above graph value of y increases with increase in value of x
It can be seen from graph that data follows a linear model well. Hence there is high linear co- relation.
Conclusion:
There is high linear co- relation.
Chapter 1 Solutions
EBK PRECALCULUS W/LIMITS
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