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Lesson plan

Lesson 9: Equivalent Equations and Functions

teaches Common Core State Standards HSA-REI.B.4.b http://corestandards.org/Math/Content/HSA/REI/B/4/b
teaches Common Core State Standards MP3 http://corestandards.org/Math/Practice/MP3

Lesson 9: Equivalent Equations and Functions

In this lesson, students find solutions to quadratic equations and recognize the solutions as \(x\)-intercepts of related functions then match equivalent equations. In the associated Algebra 1 lesson, students solve equations in factored form. Practicing finding equivalent equations and their solutions, gives students additional support before working with the Algebra 1 lesson. Explaining why equations are equivalent requires students to construct viable arguments and critique the reasoning of others (MP3).

Lesson overview

  • 9.1 Warm-up: More Equivalent Equations (5 minutes)
  • 9.2 Activity: Finding Solutions and Functions (20 minutes)
  • 9.3 Activity: Card Sort: Matching Equations (15 minutes)

Learning goals:

  • Recognize solutions to quadratic equations as \(x\)-intercepts.

Learning goals (student facing):

  • Let’s explore equivalent equations.

Required materials

  • Pre-printed slips, cut from copies of the blackline master


  • This lesson builds towards the standards:CCSS.HSA-REI.B.4.bMS.A-REI.4bMO.A1.REI.A.2c






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