Ch. 2.4, 2.6, 2.7 Test Outline.

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2.4 Writing Linear Equations

  • Slope-Intercept Form
    • Write an equation given a slope and any point.
    • Write equations of lines perpendicular to other lines.
  • Point-Slope Form
    • Write an equation given two points.
  • Convert anything into standard form,.
  • Vertical and horizontal lines and their slopes.

2.6 Special Functions

  • Constant and Identity Functions
  • Piecewise Functions
    • Absolute Value
    • Greatest Integer (step)
    • Any Old Piecewise Function
  • Graph any of these.
  • Domain and Range of any of these.

2.7 Graphing Inequalities

  • Linear Inequalities
    • Why are they linear?
    • Why are they not equations?
  • Related equations (boundary)
    • Solid or dashed? Why?
  • Graphing:
    • Graph the boundary.
    • Choose a point to decide which side to shade.
    • What points can't we choose?
  • Absolute Value Inequalities.
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