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## PowerPoint Slideshow about ' 9.2 Parabolas' - ohanzee-ojeda

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### 9.2 Parabolas

Emerald Seing

A parabola is defined in terms of a fixed point, the focus, and a fixed line, the directrix. PF=PD meaning that any point on the parabola to the focus is equal to the shortest distance from that point to the directrix.

Horizontal Directrix

- The parabola will open either up or down
- The equation will have Y by itself on one side
- The line of the directrix will cross the Y-axis
- The axis of symmetry will be on the Y-axis
- Y=…

Vertical Directrix

- The parabola will open either right or left
- The equation will have X by itself on one side
- The line of the directrix will cross the X-axis
- The line of symmertry will be on the X-axis
- X=…

These equations apply to all parabolas who’s centers are not located at (0,0).

Example One not located at (0,0).

Example not located at (0,0).

Two

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