## Function and Derivative Plotter

This applet plots a function of one variable and/or its derivative.
Be patient: the applet takes some time to load, especially if you are calling
up using a slow modem.
Initially you see the "Bounds and Frame" menu. Here you can set the names of the
X and Y axis
variables and the X and Y axis scales, and then label the axes by clicking "Draw Frame".
Then change to
the "Function plotter" menu (click on "Bounds and Frame" and choose "Function Plotter").
Enter the function
in the box after "y =". It should be an expression involving
the variable you chose to label the X axis in "Bounds and Frame" (the
default is x).
Then the "Plot function" and "Plot derivative" buttons plot this function
and its derivative respectively. Note that any variables other than this
one will be taken to be 0. "Step size" is the interval between values of the
X axis variable at which the function is calculated, and "colour" controls
the colour of the curve. You might want to change this between pressing
"Plot function" and "Plot derivative".

Mathematical Expressions