Answer
Hyperbolic paraboloid (graph k).
Work Step by Step
The equation is a graph for a Hyperbolic paraboloid with the saddle along the y-axis as shown in graph (k).
University Calculus: Early Transcendentals (3rd Edition)
by Hass, Joel R.; Weir, Maurice D.; Thomas Jr., George B.
Published by
Pearson
ISBN 10:
0321999584
ISBN 13:
978-0-32199-958-0
Chapter 11 - Section 11.6 - Cylinders and Quadric Surfaces - Exercises - Page 636: 9
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