parabola@conic.com

Champaign,IL

454 Conic Lane

A parabola is the cross section of a cone taken in parellel to the slant of the cone.

The set of all points equidistance from a point and a line

Parabolas have symmetry along the axis that passes through the vertex, foci, and is perpendicular to the directrix.

1st Equation is for a parabola that will open left or right parabolas, 2nd Equation is for one that will open up-down parabolas. P is the distance from the Vertex to Focus and -p is the disttance from Vertex to directrix.

Eccentricity of a parabola is equal to 1 because the distance from focus to point on line and directrix to point on line is by definition equal.

To graph an ellipse from an equation in standard form, center the circle at the x-coordinate: the opposite of the number being added to x in parenthasees and y-coordinate: the opposite of the number being added to y in parenthasees. Graph the vertex, the focus, and directrix, and graph points that are equidistant from the Focus to the Directrix.

Headlights use a parabolic dish to focus the light. In a parabolic dish, light that emanates from the focus will be

A. widely dispersed
B. concentrated in one direction
C. evenly dispered

Life moves pretty fast, if you don't stop and look around once and a while, you might just miss it. -Ferris Bueller

Homer: Well, I'm tired of being a wannabe league bowler. I wanna be a league bowler!

Homer: I felt a surge of power, like god must feel, when he's holding a gun.

Homer: I'm a white male, age 18 to 49. Everyone listens to me, no matter how dumb my suggestions are.