Drag the "a" slider slowly, or click on the "a" slider button once and use the up and down arrow buttons on your keyboard to adjust.

Different shapes will be formed for different values of the "k" parameter.

Sorry, the GeoGebra Applet could not be started. Please make sure that Java 1.4.2 (or later) is installed and active in your browser (Click here to install Java now)

Jerome A. White, Created with GeoGebra