Just type in x^2-y^2 into Google’s search box and you get the saddle figure – and you can move it around as well! With these types of ready- to -go aids for graphing, anyone can incorporate serious graphics into teaching and learning math. Click on the image to see a “live” version of the surface \(z=x^2-y^2\).
Wolfram Alpha is a free, online, computational engine. It provides some of the power of a computational algebra system (CAS) such as Maple or Mathematica without having to learn the proper syntax. However, it takes a little bit of practice to get WA to give exactly what you want. Here, I’ll give a list of queries that are commonly used… Read more →