The figure represents a progressive sine wave of wavelength 6.7cm at the instant 0.5s. The amplitude is 1.5 cm and the peak P is at 1.09 cm at this instant. If the peak is at x= 0 at t= 0, write the wave function in the form of Equation 2.8. It is assumed that the wave travels towards the positives.

Equation 2.8: y(x,t) = ___sin(__x - __t+___)