Shows 3-D diagram of the 4 types of conic sections. Explains how to use determinant to establish the type of section.
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Spark Notes
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Standard form of a parabola and vertex equations
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Standard form of a parabola
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Step-by-step solutions to odd-numbered problems from dozens of precalculus textbooks.
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Hotmath
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A breakdown of all the major conic sections on one webpage with their general equations and graphs. It includes information on parabolas, circles, ellipses, and hyperbolas.
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James Jones' College Algebra Lecture Notes (Math 116)
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A tool that lets you interact with the graph of a parabola by changing the directrix and the focus.
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math warehouse
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Gives helpful diagram to show the relationship between a focus, directrix, and parabola.
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Mathwords
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How to solve and graph inverse functions.
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SOS Math
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Equations and graphs of parabolas.
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Mathworld
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