Be patient while a Java applet and data files load. If things are working correctly, you will see a picture below. You can interact with this picture. To view a picture from different angles, drag the cursor over a picture while holding down the left mouse button.

The picture shows the graph of the function f(x,y)=8x³-24xy+y³ for -1≤x≤3 and -1≤y≤5. The blue edges of this graph are the plots on the handout from class. The global minimum and global maximum are indicated by red dots.