Solving Simple Harmonic Motion: Identifying Relevant Parameters

[Caraniah]

In graphs of SHM, it says that "identify and use relevant parameters from the following graphs"

1. displacement-time

My question is, what it meant by "relevant parameters"?

 

[Topher925]

I believe they are referring to the minimum amount of parameters that are required to describe the wave. Those would be: frequency, wavelength or speed, amplitude, and phase shift.