Big Ideas:
Graphs of linear functions do not always represent real-world phenomenon accurately.
In this lesson students use scenarios to compare the accuracy of a linear graph to that of a nonlinear graph. Students are given a real-world scenario and two different possible graphs -- one linear and one nonlinear. They are then asked to determine the reasonableness of a linear model in comparison to the nonlinear model.
Special Materials:
Ruler or Straightedge
Lesson plan