Warmups 1. Graph y > -x 2. Graph 2x - y < 6 3. Write 2 equations in slope-intercept form that are parallel and perpendicular to: (0,-2) y = -3x + 7.

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Presentation transcript:

Warmups 1. Graph y > -x 2. Graph 2x - y < 6 3. Write 2 equations in slope-intercept form that are parallel and perpendicular to: (0,-2) y = -3x + 7

8.5 Graphing Systems of Linear Inequalities Objective: To solve systems of inequalities by graphing.

8-5 Graphing a System of Inequalities 4 Steps: 1) Solid or Dotted Line 2) Graph! 3) Test Point - Usually (0,0) 4) Shade True = On False = Opposite

Graph: x + y < 2 and y < x Graph ONE line at a time! TRUE

Graph: x – y > 1 and y > 2 FALSE

Graph: y > 2/3x + 1 and y < 2/3x – 3 FALSE NO SOLUTION

Graph: y <-2x – 1 and y < -2x – 4 FALSE

TRY ON OWN 1) y < x + 4 y > x – 1

Work with a partner  Solving systems of inequalities worksheet  We will go over this in class!  No homework

Homework  Pg. 485 #15-37 ODD  Use the graph paper I give you