Model of a Traveling Wave

Instructions
This simulation shows an animation of a traveling wave. Use the sliders to adjust the amplitude, wavelength, and period of the wave.
[list=1][*]Which factors effect the velocity of the wave?[/*][*]Can you change both wavelength and period and still keep the same velocity?[/*][*]Can you write down the equation for this wave?[/*][/list]

Information: Model of a Traveling Wave