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Middle Grades Math: What's in a Line?
by Texas Instruments - Action Consequence Lesson

Published on August 29, 2011

Objectives

  • Students will interpret the equation y = mx + b as defining a linear function, whose graph is a straight line (CCSS).
  • Students will be able to recognize equations as defining linear functions from those that are not linear (CCSS).
  • Students will reason abstractly and quantitatively (CCSS Mathematical Practice).
  • Students will look closely to discern a pattern or structure (CCSS Mathematical Practice).

Vocabulary

  • equation
  • tables
  • graph
  • coordinates
  • function
  • linear function
  • slope or rate of change

About the Lesson

This lesson involves identifying linear functions.
As a result, students will:

  • Plot points on the coordinate graph as they begin to determine features of a linear function.
  • Plot new points for a visual check of the points "working" with the original plotted points.
  • Examine and compare the final equations that appear for each example.
  • See that equations in the form of y = mx + b represent linear functions and that other types of equations produce other functions or possibly non-functions.

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