Access Point #: MAFS.912.A-REI.4.In.12b

Graph a system of linear inequalities in two variables using at least two coordinate pairs for each inequality.
Clarifications:

Essential Understandings

Concrete:

  • Identify the y-intercept (where the line crosses the y-axis, or x = 0).
  • Graph the linear inequality.
  • Understand that a linear inequality divides the coordinate plane into two halves by a boundary line where one half represents the solutions of the inequality.
  • Identify above and below the boundary line.
  • Locate coordinate pairs.
  • Identify or shade the half-plane that is a solution to the inequality.

    Graph with shade over the half-plane that is a solution to the inequality.
  • Graph the second inequality on the same coordinate grid. The overlapping shaded area is the solution to the system.

    •	Graph the second inequality on the same coordinate grid.  The overlapping shaded area is the solution to the system.
Representation:
  • Understand ordered pairs.
  • Understand coordinate planes.
  • Understand <, >, =.
  • Understand the following related vocabulary: boundary line and linear inequality.
General Information
Number: MAFS.912.A-REI.4.In.12b
Category: Independent
Date Adopted or Revised: 06/14
Cluster: Represent and solve equations and inequalities graphically. (Algebra 1 - Major Cluster) (Algebra 2 - Major Cluster)

Clusters should not be sorted from Major to Supporting and then taught in that order. To do so would strip the coherence of the mathematical ideas and miss the opportunity to enhance the major work of the grade with the supporting clusters.

Related Standards

This access point is an alternate version of the following benchmark(s).

Related Courses

This access point is part of these courses.
1200310: Algebra 1
1200320: Algebra 1 Honors
1200370: Algebra 1-A
1200400: Foundational Skills in Mathematics 9-12
1200300: Basic Mathematics Skills (Formerly Pre-Algebra)
7912070: Access Liberal Arts Mathematics
7912080: Access Algebra 1A
1200315: Algebra 1 for Credit Recovery
1200375: Algebra 1-A for Credit Recovery
7912100: Fundamental Algebraic Skills
1207300: Liberal Arts Mathematics 1
7912075: Access Algebra 1

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