
a.
The system of the linear equations for the data.
a.

Answer to Problem 72E
Explanation of Solution
Given information:
The table shows the numbers of international travelers
Calculation:
From the given information,the table shows the numbers of international travelers
The data can be modelled by the quadratic function
The system of equations are:
b.
The least square regression parabola.
b.

Answer to Problem 72E
Explanation of Solution
Given information:
The table shows the numbers of international travelers
Calculation:
To find the least square regression line write the system in matrix form
Find the inverse of
Identify the inverse using row operations by multiplying the first row by
Multiply the first row by
Multiply the second row by
Multiply the third row with
Multiply the second row by
The solution to the system is
The solutions are
Thus, the system of matrix equations are
c.
The graph of the parabola by using graphing utility.
c.

Answer to Problem 72E
Explanation of Solution
Given information:
The table shows the numbers of international travelers
Calculation:
From the given information,the table shows the numbers of international travelers
The graph of the parabola are as follows:
d.
The graph of the parabola by using graphing utility.
d.

Answer to Problem 72E
No, because the model will increase without bound for higher values of
Explanation of Solution
Given information:
The table shows the numbers of international travelers
Calculation:
No, because the model will increase without bound for higher values of
Chapter 8 Solutions
Precalculus with Limits
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