Mercedes is using periodic functions to model waves in the ocean. A crest is considered a maximum and a trough is considered a minimum. Values for y represent the vertical position, in feet, above or below the line of equilibrium (midline) and values for x represent the distance, in feet, from a fixed point. Crests - --equilibrium Troughs 1. Mercedes tries this technique to model waves she observes at sunrise. The crests average 3.8 ft, the troughs average -3.8 ft, and the frequency is function that could represent this situation. Explain. Write a