
Concept explainers
To graph: The quadratic surface

Explanation of Solution
Given information:
The equation of quadratic surface
Graph:
The graph of the quadratic surface
A viewing rectangle is that rectangular portion of the graph of the given equation in display which depicts the viewing window in which the graph van be fitted suitably. The need for viewing rectangle arose because the default screen does not display the complete information at times, which can be misleading too.
Therefore, the viewing rectangle must be chosen with care.
In general, if the
Then, it is said that the displayed portion for the given graph lies in the rectangle:
Therefore the viewing rectangle is given as
Now for the given quadratic surface
Hence the viewing rectangle is
Interpretation:
Now for the given quadratic surface, it can be seen that:
Hence the viewing rectangle is
Moreover if a viewing rectangle with smaller dimensions are chosen then the graph fails to fit in it, thereby giving the incomplete or misleading information about the quadratic equation.
Similarly if a viewing rectangle with much larger dimensions are chosen then the graph depicts a lot of extra and unnecessary information which is not required.
Thus, this is the most appropriate representation for the graph.
Chapter 1 Solutions
EBK PRECALCULUS: MATHEMATICS FOR CALCUL
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