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Warmup Alg 2 17 & 18 Apr 2012

Warmup Alg 2 17 & 18 Apr 2012. Agenda. Don't forget about resources on mrwaddell.net Section 9.2: Parabolas again! Vertex Axis of symmetry Directrix Up, down, left and right. Go over assignment from last class period. Section 9.2: Graphing Parabolas. Vocabulary.

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Warmup Alg 2 17 & 18 Apr 2012

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  1. WarmupAlg 2 17 & 18 Apr 2012

  2. Agenda • Don't forget about resources on mrwaddell.net • Section 9.2: Parabolas again! • Vertex • Axis of symmetry • Directrix • Up, down, left and right

  3. Go over assignment from last class period

  4. Section 9.2: Graphing Parabolas

  5. Vocabulary A function with a SINGLE “squared” term • Parabola • Focus • Directrix • Vertex • Axis of symmetry Axis of Symmetry Focus Distances are the same! Vertex Directrix

  6. Quadratics

  7. Quadratics 2

  8. Practice – Graph & label the Focus, Directorix and axis of symmetry The problem Solve for x = Find the value for “p” Therefore “p” = 2

  9. Now Graph it. • “p” is 2, and what direction does it open? It is an “x =“ so it opens left or right. Why? Vertex = (0,0) Focus = (2,0) Directrixis x = -2 Graph the parabola in between!

  10. Practice – Graph & label the Focus, Directorix and axis of symmetry The problem Solve for y= Find the value for “p” Therefore “p” = 6

  11. Now Graph it. • “p” is 6, and what direction does it open? It is an “y =“ so it opens up or down Why? Vertex = (0,0) Focus = (0,6) Directrixis y = -6 Graph the parabola in between!

  12. Assignment • Section 9.2: 10 - 21

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