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Published byFelicia Flowers Modified over 9 years ago
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Homework out to check Solve the following 1.l 9 +x l < 7 2.l 2x + 3 l > 3 3.X = 7 is this a solution 2x – 4 >19? Yes or no 4.X = 4 is this a solution -5x < -3? Yes or no
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Stand in back for new seats Get homework out as soon as you sit down & turn in test corrections!
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Homework out to check Warm-up 1.X = 7 is this a solution 2x – 4 >19? Yes or no 2.X = 4 is this a solution -5x < -3? Yes or no Need graph paper out!
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Graph the following equation -2x +Y = 3
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6.5 graphing linear inequalities Linear Inequalities are graphed on the coordinate plane just like equations. Only difference – many answers not on the line. When graphing – must always use 3 points unless you are using the x- & y- intercepts.
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Steps to graph a linear inequality 1.Sketch the graph of the inequality just like if there was an equal signs. a.Dashed line if it is b.Solid line if it is c.the line separates the graph into 2 halves 2.Test any point from one of the halves of the graph by substituting it into the equation. 3.If the point IS a solution to the equation, shade that half of the graph. If not a solution, shade the other half of the graph.
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Before sketching a graph w/2 variables, it is EXTREMELY HELPFUL to change the equation to slope-intercept form Graph x + 7 > y 1.change to S-I-F (if necessary) 2.Make a t-chart & find 3 points 3.Graph the line (dashed or solid) 4.Test a point on 1 side of the line 5.shade
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examples X < -3 Y > 4
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You Need graph paper Try these 1.-2x + y > 4 2.3x + 3y < 9
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