Description and Additional Formats:

This image represents the graph of the funcion u = x over the interval from -1 to 1. The image is the diagonal of a square, which is show surrounding the graph. The colors in the lower left indicate which axis is which (red represents the x-axis, and green the u-axis). This color coding is also used in our images of graphs in higher dimensions.

Additional Formats:

[Link here about formats, applications, etc.]