WeBWorK Standalone Renderer

Sketch a graph of each surface. Then, match each surface to its brief description in words.

1. $z = 9 x^2 - y^2$

2. $x^2 + y^2 + z^2 = 16$

3. $x^2 + y^2 = 25$

4. $z = x^2 + 9 y^2 + 4$

5. $z^2 = x^2 + 36 y^2$

A. Skew line
B. Elliptical cylinder
C. Circle
D. Elliptic paraboloid
E. Hyperbolic paraboloid (saddle)
F. Sphere
G. Sinusoidal cylinder
H. Cone
I. Circular cylinder

You can earn 60% partial credit for 3 - 4 correct answers.