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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. Sketch the graph of the parabola

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warm up

Warm-up

Homework out

Warm-up

Pg. 485

#2-10 evens in algebra book

9 6 graphing quadratic inequalities
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
Steps to graphing quadratic inequality
  • Sketch the graph of the parabola
    • Find the vertex,
    • 1 point to the left,
    • 1 point to the right,
    • use a dashed parabola for > or <.
    • Use a solid parabola for > or <
  • Test one point either inside or outside of the parabola. (0,0) is easiest if it is not on the parabola.
  • 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
Need a piece of graph paper
  • Graph y < x2 – 4x + 2
  • Graph y > 2x2 – 8x + 2
9 7 exploring data comparing models
9.7 Exploring data: comparing models

4 basic types of algebraic models

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