University Calculus: Early Transcendentals (3rd Edition)

Published by Pearson
ISBN 10: 0321999584
ISBN 13: 978-0-32199-958-0

Chapter 13 - Section 13.1 - Functions of Several Variables - Exercises - Page 682: 35



Work Step by Step

We can see that there are many slide-like shapes when we look at the graph of the 3D surface in $\bf{d}$. This matches the graph of the 2D level curves that contains many semi-oval rings. Hence, our correct option is $\bf{d}$.
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