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Coolmath Precalculus Review Calculus Preview
Lesson 9 - Graphing - Sideways Parabolas (page 1 of 6)
---- This Precalculus review (Calculus preview) lesson explains how to graph sideways parabolas.

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Graphing Calculator Scientific Calculator << a new window will open for these
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Yeah...  sorry to tell you...  But, you really do have to know how to graph these...  And I don't want you trying to plot points like you don't know what you're doing!
 
First, let's take a new view of our coordinate system.  arrow

This will get us through these!

Negative x's are to the left of the y axis  ...  Positive x's are to the right of the y axis  ...  Positive y's are above the x axis  ...  Negative y's are below the x axis

 

Now, let me introduce you to Sideways Parabola Guy:

x = y^2  instead of y = x^2

Graph of Sideways Parabola Guy  ...  goes through the points  ( 4 , 2 ) , ( 1 , 1 ) , ( 1 , -1 ) , ( 4 , -2 )

He's the same shape as Standard Parabola GuyHe opens towards positives -- just like Standard Parabola Guy:

Standard Parabola Guy  ...  opens towards positives

Sideways Parabola Guy  ...  opens towards positive x's

Now, we are going to need to be able to move this new guy around.

Continued on the next page

 The printing and distribution and/or downloading of these lessons is strictly prohibited.

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Graphing Calculator Scientific Calculator << a new window will open for these
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