What is the focus and directrix of a vertical parabola

The video tutorial covers the basics of parabolas, focusing on the vertex form and introducing the concepts of focus and directrix. It explains how to calculate these elements and derive the formula for vertical parabolas, emphasizing the role of the parameter P in determining the parabola's direction. The tutorial also discusses the implications of P and A values on the parabola's orientation.

Discuss the implications of P being greater than or less than zero for a vertical parabola.

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Why can't P equal zero in the context of parabolas?

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What role does the vertex play in the definition of a parabola?

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