Tim and sam walked down to the pier on a warm summer day to which the tides go in and out. at 9 am hour 9 the water below the pier was at its highest level, 13 feet. tim and sam lazily watched the water drop until 3: 15 hour 15.25 the water below the pier was at its lowest level a night of 3 feet. sketch a graph of the sinusoid representing the height of the water. include 5 important points