What is the role of the phase constant in simple harmonic motion?

[bcjochim07]

Homework Statement

How can I determine the phase constant of the these graphs? I am kind of confused about phase constant and its physical meaning, so if someone could explain it to me, I would be very grateful.

Homework Equations

The Attempt at a Solution

 

[Hootenanny]

Have a look at this wiki page ( http://en.wikipedia.org/wiki/Phase_(waves ) ) it might help to answer some of your questions.