Sinead Gormally Dannielle Garceau Nicole Dillon Chyna Marino
- Slides: 5
Sinead Gormally, Dannielle Garceau, Nicole Dillon, Chyna Marino
� Parabola: A Parabola is the collection of all points P in the plane that are the same distance from a fixed point F as they are from a fixed line D. Point F is the Focus of the Parabola and line D is its directrix. |a| - is the distance from the focus to the vertex. (x-h)2= ± 4 a(y-k) – Used for a parabola facing up or down. Facing up is a positive parabola and down is a negative parabola. Directrix is a y line. � (y-k)2= ± 4 a(x-h) – Used for a parabola facing left or right. Facing right is a positive parabola and left is a negative parabola. Directrix is a x line. � (h, k) represents the center. �
https: //www. youtube. com/watch? v=e. Gsn 8 y Htf. P 4 (intro ; ) http: //www. youtube. com/watch? v=a 4 NZSIAR Rhc (analyzing a parabola)
http: //www. youtube. com/watch? v=AVLXNy. D og. Ms (completing the square)
� Parabola: A Parabola is the collection of all points P in the plane that are the same distance from a fixed point F as they are from a fixed line D. Point F is the Focus of the Parabola and line D is its directrix. |a| - is the distance from the focus to the vertex. � (x-h)2= ± 4 a(y-k) – Used for a parabola facing up or down. Facing up is a positive parabola and down is a negative parabola. Directrix is a y line. � (y-k)2= ± 4 a(x-h) – Used for a parabola facing left or right. Facing right is a positive parabola and left is a negative parabola. Directrix is a x line. � (h, k) represents the center. � Practice Problems!!!!!! -FIND THE EQUATION & GRAPH!!!!!!! 1) Focus at (4, -3), Directrix the line x=0!!!! 2) Word Problem: A reflector is parabolic in cross section, with receiver at focus. Dish is 8 ft across at its opening and 3 ft deep at its center. At what position should the receiver be placed? ?
