A110xNotesVertexForm.notebook
P59 10x Vertex Form
March 24, 2016
Aug 196:20 AM
Quadratic Functions
Parent Function y = x
2
Reflection in xaxis y = x
2
Stretch (a > 1) y = a x
2
Shrink (0 < a < 1)
(by a factor of a )
Reflection in xaxis y = a x
2
Sep 229:21 AM
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A110xNotesVertexForm.notebook
March 24, 2016
2
h is a horizontal shift / k is a vertical shift
Vertex is at (h, k)
Axis (Line) of Symmetry is at x = h y = 3(x 2)
2
+ 5 h shifts it to the Right 2.
k shifts it Up 5.
a means it is stretched.
Vertex is at (2, 5 )
Line of Symm is at x = 2
Oct 87:09 AM
Using Vertex Form to Graph y = 2(x + 1)
2
4 h is 1 because the formula is (x h) h shifts it to the left 1.
k shifts it down 4.
a means it is stretched.
Line of Symm is at x = 1
Vertex is at (1, 4)
Find another point and reflect it over Line of Symm.
x = 0 y = ? 2
Oct 98:58 AM
2
A110xNotesVertexForm.notebook
Practice Graphing Vertex Form y = 3(x + 2)
2
+ 4 a = Opens Down/Stretched h = 2 k = 4
Line of Symm is x = 2
Vertex is at (2, 4)
Substitute and Find 1 extra point.
Sketch the Parabola
Find another point and reflect it over Line of Symm.
x = 0 y = ? 8
Oct 87:09 AM
March 24, 2016
2
+ 10x + 7
1. Find Vertex
2. Substitute a, h, and k into the formula
Oct 88:35 AM
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A110xNotesVertexForm.notebook
Convert from Vertex to Standard
March 24, 2016
Feb 261:52 PM
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