The points on the graph of the motion of the mass on a spring can be described by the mathematical function y(t)=Acos(−2πft+ϕ) where cos is the cosine function, f is the frequenc...The points on the graph of the motion of the mass on a spring can be described by the mathematical function y(t)=Acos(−2πft+ϕ) where cos is the cosine function, f is the frequency, A is the amplitude (maximum displacement) and ϕ is the phase in radians.