Warm-up Homework out Warm-up Pg. 485 #2-10 evens in algebra book.

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Presentation transcript:

Warm-up Homework out Warm-up Pg. 485 #2-10 evens in algebra book

9.6 Graphing Quadratic Inequalities Reminder: when graphing inequalities, you have to SHADE the part of the graph this makes the inequality true.

Steps to graphing quadratic inequality 1.Sketch the graph of the parabola a)Find the vertex, b)1 point to the left, c)1 point to the right, d)use a dashed parabola for > or <. e)Use a solid parabola for > or < 2.Test one point either inside or outside of the parabola. (0,0) is easiest if it is not on the parabola. 3.If that point makes the inequality true, shade in the area that contains that point. If it makes the inequality false, shade the opposite area.

Need a piece of graph paper Graph y < x 2 – 4x + 2 Graph y > 2x 2 – 8x + 2

9.7 Exploring data: comparing models 4 basic types of algebraic models Type of ModelEquationGraph LinearY = mx + bline Absolute value Y= m l x + b l + c V-shaped ExponentialY = c(1 + r) x Y = c(1 - r) x Exponential curve QuadraticY=ax 2 + bx + cU-shaped

Turn to pg. 492 in alg book – see example 1