The graph shows the depth of water, in feet, of a horse trough over a certain amount of time, in minutes.

Part A: Identify the interval(s) where the graph is increasing, decreasing, and constant. (3 points)

Part B: What are the domain and range of the relation? (3 points)

Part C: Does the graph represent a function? Explain your reasoning. (3 points)

Part D: Write a detailed description of the graph using the real-world scenario and the information from Part A. (3 points)