The Graph of a Linear Equation in Two Variables Is a Line

Show your class that linear equations produce graphs of lines. The 20th segment in a unit of 33 provides proof that the graph of a two-variable linear equation is a line. Scholars graph linear equations using two points, either from standard form or slope-intercept form.

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CCSS: Designed
Additional Tags
Instructional Ideas
  • Video the proof section and have pupils watch it prior to class
Classroom Considerations
  • Requires graph paper for the problem set
  • The lesson is the last of the group to show the graph of a linear equation is a line
  • Includes alternative exercises to the proof
  • The answer key shows any necessary work to find points to graph
  • None
Common Core