Parabolas
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# Parabolas

Parabolas in Algebra
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## Finding the vertex, axis of symmetry, and x-intercepts

Finding the vertex, axis of symmetry, and x-intercepts: http://t.co/QSR4OTX0IB via @YouTube
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## St. Louis Gateway Arch - EnchantedLearning.com

St. Louis Gateway Arch
RoseMarie Handshaw's insight:

This website will give you a prime real-world example of a parabola:  the Gateway Arch in St. Louis, Missouri.  The site gives pertinent facts and figures such as the dimensions of the arch and methods used for its construction.

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## Answer students' questions and become popular!

F(x)=x^2+2x-3
(a) dertemine the axis of symmetry of this graph.
(b)dertemine the x-and y-intercepts http://t.co/FjRUQ7Pl3Z
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## Answer students' questions and become popular!

Find a) vertex, b ) focus, c) directrix, d) symmetry axis, e) focal distance of the parabola of this equation, http://t.co/G4ShBhH3kb
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RoseMarie Handshaw's insight:

When you graph a quadratic equation such as y=x^2 + 2x - 3, you get a parabola.  The minimum or maximum point is called the vertex.  The axis of symmetry is the vertical line that goes through the vertex.  The axis of symmetry of the parabola is determined by the formula x = -b/(2a).

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