The applet will allow you to create piecewise-defined functions that will create the profile (cross-section) of your goblet. The applet will also show you the surfaces obtained by revolving the goblet profile around an axis of rotation.[br][list][br][*] Type a function of [math]x[/math] into the input box: [math]y = f(x)[/math]. (no implicit functions and no [math]x(y)[/math].)[br][/*][*] Move points C and D to choose an axis of rotation.[br][/*][*] Move points A and B to select a segment of your function for rotation.[br][/*][*] Either drag the angle slider by hand to revolve your function segment around your axis or click the triangle to revolve automatically.[br][/*][/list]