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Home > PC > Chapter 2 > Lesson 2.3.1 > Problem 2-73


Lew walks every day at lunch when he is working. The amazing thing about Lew is that he walks at a constant rate (velocity) for the whole time he walks. He walks for hour every day and travels at a rate of miles per hour. 

  1. Draw a graph of Lew’s lunchtime walk, being sure to label both axes. Shade the area between the curve and the ­-axis over the appropriate domain.

    First quadrant graph, x axis labeled time (hours), scaled in tenths from 0 to 1, y axis labeled miles per hour, scaled in ones from 0 to 6, horizontal segment at y = 4, area below segment is shaded.

  2. Explain why the domain will only be between and . What is the range of this function?

    The domain is time elapsed, and Lew walks for one hour. The range is miles per hour.

  3. The figure that is shaded on your graph should resemble a rectangle. Using unit analysis and the units from each axis, find the resulting units when you find the area of the rectangle.

    The units are miles since:

  4. Find the area of the shaded region. Include the proper units.

    Use the graph above to figure this out.