Concept explainers
(a)
To find: The graphing utility for the graph of the model.
(a)
Answer to Problem 105E
Thegraph for the function is shown in Figure 3
Explanation of Solution
Given:
The equation for the model is
Calculation:
Consider the given model is,
Use the graphing utility Ti-83.
Press Y=1 and enter equation of model as shown in Figure 1
Figure 1
Press the window button to set the range of the window as shown in Figure 2
Figure 2
Press the trace button and the graph is shown in Figure 3
Figure 3
(b)
To find: The value of
(b)
Answer to Problem 105E
Therequired value is
Explanation of Solution
Consider the graph is shown in Figure 3
From the graph the value at which the grade point of average of at least 3.0 is,
(c)
To find: The verification of the estimate from part (b) algebraically.
(c)
Answer to Problem 105E
Theestimate of part (b) is verified as
Explanation of Solution
Consider the given model is,
Then,
(d)
To find: The factor that influences the GPA.
(d)
Answer to Problem 105E
Thefactor that influences the GPA isdefined.
Explanation of Solution
Consider the factor that may influence GPA as,
The number of hours scheduled for the study.
The available study material for the given exam.
The number of questions attempt in the exam.
Chapter A Solutions
EBK PRECALCULUS W/LIMITS
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