WeBWorK Standalone Renderer

Sketch a contour diagram of each function. Then, decide whether its contours are predominantly lines, parabolas, ellipses, or hyperbolas.

1. $z = y - 4 x^2$

2. $z = - 2 x^2$

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

4. $z = x^2 - 5 y^2$

You can earn 50% partial credit for 2 - 3 correct answers.