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Home > AC > Chapter 4 > Lesson 4.2.1 > Problem 4-73


Gale and Leslie are engaged in a friendly 60-mile bike race that started at noon. The graph below represents their progress so far.

  1. What does the intersection of the two lines represent?

  • Find the intersection point on the graph.
    The lines represent the distance and time of the riders.
    Knowing this, what does the intersection mean?

  • Leslie passes Gale.

  1. At what time (approximately) did Leslie pass Gale?

  • Look at the intersectionpoint and then find the corresponding time at the bottom of the graph.

  • About 2:00.

  1. About how far had Leslie traveled when she passed Gale?

    Find the intersection point and then look at the corresponding distance on the side of the graph.

    About 18 miles.

  2. What do you think happened to Gale between 1:30 and 3:00?

    Answers will vary, but should have something to do with Gale stopping.

  3. If Leslie continues at a steady pace, when will she complete the race?

    Estimated to be at 6:40.