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53 Transforming Parabolas Day 1 1 November 19, 2008 Nov 157:33 PM Objectives: Use the vertex form of a quadratic function to: graph quadratic functions and write the equations of quadratic functions from graphs. 5.3 Parabolas  Day 1 ing

5-3 Transforming Parabolas Day 1 - Poudre School District

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5-3 Transforming Parabolas Day 11
Objectives:   Use the vertex form of a quadratic function to:
graph quadratic functions and write the equations of quadratic functions from graphs.
5.3 Parabolas ­ Day 1ing
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3
Jun 2 ­ 8:52 AM
* equation in vertex form f(x) = a(x ­ h)2 + k * the graph looks like a "U"  * a impacts the size
Quadratic Functions
4
Jun 2 ­ 8:52 AM
* equation in vertex form f(x) = a(x ­ h)2 + k * the graph looks like a "U"  * a impacts the size
* a>1 makes the graph more narrow * 0<a<1 makes the graph wider * a<0 flips upsidedown
Quadratic Functions
5
Jun 2 ­ 8:52 AM
Quadratic Functions * equation in vertex form f(x) = a(x ­ h)2 + k * the graph looks like a "U"  * a impacts the size
* a>1 makes the graph more narrow * 0<a<1 makes the graph wider * a<0 flips upsidedown
* h is the horizontal movement  * k is the vertical movement
5­3 Transforming Parabolas Day 1
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Jun 2 ­ 10:27 AM
What do changes in "a", "h" & "k" look like when you graph a quadratic function?
Open attachments &
play slider!!
* equation in vertex form f(x) = a(x - h)2 + k Quadratic Functions
5­3 Transforming Parabolas Day 1
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Nov 15­10:02 PM
How do you find points on the graph with different values of a? Graph the Quadratic Parent Function:  y = x2
Re­written:  y = 1(x ­ 0)2 + 0
Vertex:  (0, 0) Axis of Symmetry:  x = 0
Table of values to graph: x y
Graph:  y = 2x2  (on the same graph) What changes are caused by a = 2?
5­3 Transforming Parabolas Day 1
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5­3 Transforming Parabolas Day 1
9
Graph each quadratic function & find the domain and range:
1. f(x) = (x + 4)2 - 2 2. f(x) = (x - 2)2 - 3 3. f(x) = - (x - 1)2 + 2
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- 2
- 2
- 4
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4
1. f(x) = -(x + 3)2 + 1 2. f(x) = 4(x + 2)2 - 3 3. f(x)= - 1/2(x - 1)2 + 4
Graph each quadratic function & find the domain and range:
D: R:
D: R:
D: R:
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Homework: page 255 (2 - 10, 13 - 20, 24 - 26, 43 - 45, 76, 77)
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