Driving Rationally

Calculating average speeds is not as simple as finding an average. The lesson introduces class members to rational functions by presenting a problem about finding an average speed for the rest of a trip. Pupils develop an equation to find the average speed and graph the equation.

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CCSS: Adaptable
Instructional Ideas

  • Provide the class with a graph of a rational function and label features of the graph, giving definitions for those parts along the way
Classroom Considerations

  • Assumes individuals are familiar with distance-rate-time problems
  • Requires access to graphing calculators or other graphing technology
Pros

  • Provides a presentation to guide the lesson
  • The handouts are also in Word and allow for modifications
Cons

  • None