The height of the water in the Petticodiac river at high tide was measured to be 13 m. After 6 H the depth of the water was found to be 1 m. a. Draw a graph of height of the water for a 36 h period, starting at high tide. b. Find an equation expressing the depth of the water hours after high tide. C. What height will the water be at 20 h after the initial high tide?