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# Parabolas and the Distance Formula

## Quadratic as set of points equidistant from a focus point and directrix.

Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.

## Parabolas and the Distance Formula

Definition of a parabola, exploring a parabola using the distance formula.

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• Video

## Parabola Focus and Directrix 1

Shows the parabola as the locus of all points equidistant from a point and a line.

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• Practice
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