9'2 Parabolas

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9.2 Parabolas
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Essential Question

• What are the parts of a parabola, and how do you
  graph them?

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Examine the equations and corresponding graphs.
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Write the standard equation of the parabola with
its vertex at the origin and with the directrix y
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1. Draw a diagram.
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Graph the parabola y 2 - 8y 8x 8 0.Label
the vertex, focus, and directrix.
1. Complete the square to find the standard
equation.
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Graph the parabola y 2 - 8y 8x 8 0.Label
the vertex, focus, and directrix.
2. From the standard equation, the vertex is (1,
4). Find p.
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Graph the parabola y 2 - 8y 8x 8 0.Label
the vertex, focus, and directrix.
3. Use a table of values. Choose y-values from 0
to 8.