A set of "squarish" graph, the 4th power counterpart of circles and ellipses. These are good for testing the students' comprehension of implicit equations.
Version for commercial use and for supporting my Super Fun Easy Integrated Math/Physics Project.
A free version is also available for non-commercial use.
The Mathematica 6.0 notebook file that I wrote to generate the images is also included. It requires Mathematica to use.