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# Warm-up - PowerPoint PPT Presentation

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

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
• 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
• Graph y < x2 – 4x + 2
• Graph y > 2x2 – 8x + 2
9.7 Exploring data: comparing models

4 basic types of algebraic models