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Home > PC > Chapter 2 > Lesson 2.3.8 > Problem 2-173


First quadrant curve, titled spawning rate of salmon, x axis labeled minutes, scaled in twenties from 0 to 60, y axis scaled in tens from 0 to 50, with the following approximate points: starts at (0, comma 22), turning down @ (20, comma 52), turning up @ (25, comma 30), turning down @ (40, comma 30), turning up at (50 comma 20), turning down at (55, comma 50), area below the curve is shaded.The graph to the right shows the rate of salmon entering a fish hatchery during a minute period. 

  1. A gate fell during the time interval disrupting the flow of the salmon. About what time did this occur?

    Where does the graph have a maximum followed by a steep decrease?

  2. What does the shaded area represent?

    Multiply the units on the axes.