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Warm Up April 17th

Warm Up April 17th. 1. What is the focus and directrix ? 2. What is the vertex and which direction does the parabola open?. Week 13 #4. Find the point(s) of intersection algebraically. Parabolas. Writing equations. If p is POSITIVE the parabola opens UP

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Warm Up April 17th

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  1. Warm Up April 17th 1. What is the focus and directrix? 2. What is the vertex and which direction does the parabola open?

  2. Week 13 #4

  3. Find the point(s) of intersection algebraically.

  4. Parabolas Writing equations

  5. If p is POSITIVE the parabola opens UP • If p is NEGATIVE the parabola opens DOWN When xis squared

  6. If p is POSITIVE the parabola opens RIGHT • If p is NEGATIVE the parabola opens LEFT When yis squared

  7. Graph what you have been given. • Find the p-value. • Identify h and k. • Write the equation. Writing the equation of the parabola

  8. Focus (0, 1) • Directrix: y = 5 1. Graph what you have. Find the p-value. Find (h, k). Graph Opens DOWN p = -2 So multiply it by 4.  V (0, 3)  F

  9. Focus (2, 0) • Directrix: x = -1 2. Graph what you have. Find the p-value. Find (h, k). Graph Opens RIGHT p = 1.5 So multiply it by 4. V (.5, 0)   F

  10. Focus (0, -5) • Directrix: y = 0 3. Graph what you have. Find the p-value. Find (h, k). Graph Opens DOWN p = -2.5 So multiply it by 4.  V (0, -2.5)  F

  11. Focus (-4, 0) • Directrix: x = -2 4. Graph what you have. Find the p-value. Find (h, k). Graph Opens LEFT p = -1 So multiply it by 4.  F  V (-3, 0)

  12. Vertex (0, 0) • Focus (0, -2) 5. Graph what you have. Find the p-value. Find (h, k). Graph Opens DOWN p = -2 So multiply it by 4.  V  F

  13. Vertex (0, 0) • Focus (0, -3) 6. Graph what you have. Find the p-value. Find (h, k). Graph Opens DOWN p = -3 So multiply it by 4.  V  F

  14. Focus(0, 4) • Directrix: x = -4 7. Graph what you have. Find the p-value. Find (h, k).  F  V Graph Opens RIGHT p = 2 So multiply it by 4.

  15. CW/HW worksheet

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