(a) Find and identify the traces of the quadric surface  x2 + y2 − z2 = 81  given the plane. x = k Find the trace.       Identify the trace. circleellipse    hyperbolaparabola y = k Find the trace.       Identify the trace. circleellipse    hyperbolaparabola z = k Find the trace.       Identify the trace. circleellipse    hyperbolaparabola Describe the surface from one of the graphs in the table. ellipsoidelliptic paraboloid    hyperbolic paraboloidconehyperboloid of one sheethyperboloid of two sheets

Elementary Geometry For College Students, 7e
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ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
Chapter10: Analytic Geometry
Section10.1: The Rectangular Coordinate System
Problem 44E: By definition, a hyperbola is the locus of points whose positive difference of distances from two...
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(a) Find and identify the traces of the quadric surface 

x2 + y2 − z2 = 81

 given the plane.

x = k

Find the trace.
 
 
 


Identify the trace.
circleellipse    hyperbolaparabola

y = k

Find the trace.
 
 
 


Identify the trace.
circleellipse    hyperbolaparabola

z = k

Find the trace.
 
 
 


Identify the trace.
circleellipse    hyperbolaparabola


Describe the surface from one of the graphs in the table.

ellipsoidelliptic paraboloid    hyperbolic paraboloidconehyperboloid of one sheethyperboloid of two sheets


(b) If we change the equation in part (a) to 

x2 − y2 + z2 = 81,

 how is the graph affected?

The graph is rotated so that its axis is the x-axis.The graph is rotated so that its axis is the y-axis.    The graph is rotated so that its axis is the z-axisThe graph is shifted one unit in the negative y-direction.The graph is shifted one unit in the positive y-direction.



(c) What if we change the equation in part (a) to 

x2 + y2 + 2y − z2 = 80?

 

The graph is rotated so that its axis is the x-axis.The graph is rotated so that its axis is the y-axis.    The graph is rotated so that its axis is the z-axisThe graph is shifted one unit in the negative y-direction.The graph is shifted one unit in the positive y-direction.
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Hello. Since your question has multiple parts, we will solve first question for you. If you want remaining sub-parts to be solved, then please resubmit the whole question and specify those sub-parts you want us to solve.

Consider the given:

x2+y2z2=81Plane x=kk2+y2z2=81      y2z2=81k2This is required trace.The trace is hyperbola.

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