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Published byLindsay Evangeline Norris Modified over 7 years ago

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2.7 Two-Variable Inequalities

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y _____ dashed line. This means that the line is NOT part of the solution. y _____ dashed line. This means that the line is NOT part of the solution.

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y _____ solid line. This means that the line IS part of the solution. y _____ solid line. This means that the line IS part of the solution.

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Which way do you shade the graph? Graph the inequality y > -x + 2 Which way do you shade? - Pick a point, not on the line. Plug it in and see if the equation is true.

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Which way do you shade the graph? Graph the inequality y > -x + 2 What is the easiest point to pick? (0,0) Plug in – 0 > - (0) + 2

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Which way do you shade the graph? Graph the inequality y > -x + 2 0 > - (0) + 2 Is this true? NO. So don’t cover this point; shade the other direction.

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What if the answer WAS true? Graph the inequality y < -x + 2 0 < - (0) + 2 Is this true? YES. So DO cover this point; shade the graph to cover the point.

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Practice: graph each inequality a. y < 3x – 2 b. y < |x + 4| - 3 c.y > |x - 3| + 2

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