Part 1: a fisherman standing down river from a large hydropower dan notices that the water level is at its lowest point of 24 inches at 8am and then at its highest point of 38 inches at 10:30am. Sketch a graph of the rivers water level, then write an equation that models the depth of the water in inches as a function of time in hours.

Part 2 : there is a section of the river where the fish become the most active when the river’s depth is above 35 inches. He works from 9am to 5pm but wants to fish during a period of time when fish are the most active. Between which times of the day should he try to fish?