(this text courtesy of HENSA)

Description:

The Graphs application produces graphs of mathematical functions.  It
can graph cartesian, parametric and polar functions.  Functions can be
entered in true algebraic form, utilising any of a large number of inbuilt
functions such as hyperbolic trig or factorials.  Operation can be in
degrees or radians.  Zooming of cartesian functions is possible by using
the mouse to define the zoom area.  This is useful for solving equations.
The graphs produced can be saved as a draw file.  Axes can be set manually
or automatically calculated and multiple graphs of any one type can be
produced on the same set of axes.