9-3 Transformations of Quadratic Functions.notebook · 2017-12-20 · 93 Transformations of...
-
Upload
phungnguyet -
Category
Documents
-
view
225 -
download
0
Transcript of 9-3 Transformations of Quadratic Functions.notebook · 2017-12-20 · 93 Transformations of...
93 Transformations of Quadratic Functions.notebook
1
March 08, 2014
93 Transformations of Quadratic Functions
Goals:
1. Apply translations to quadratic functions.
2. Apply dilations and reflections to quadratic functions.
A transformation changes the position or size of a figure.
There are four types of transformations:
1. translation
2. dilation
3. reflection
4. rotation
move
larger/smaller
turn
flip
A translation moves a figure:
up down
leftright
on a coordinate plane
When a constant k is added to or subtracted from the parent function, the graph of the resulting function f(x) ± k is the graph of the parent function translated up or down.
Parent Function (Parent Graph)
The simplest of functions in a family
A family of graph is a group of graphs with one or more similar characteristics (p. 163)
93 Transformations of Quadratic Functions.notebook
2
March 08, 2014
The parent function of the family of quadratics is:
f(x) = x2
We will use the letters h and k when we are talking about translations.
h always tags with x (horizontal)
k always tags with y (vertical)
Describe how the graph of each function is related to the graph of f(x) = x2
93 Transformations of Quadratic Functions.notebook
3
March 08, 2014
Describe how the graph of each function is related to the graph of f(x) = x2
Horizontal AND Vertical Translations
Describe how the graph of each function is related to the graph of f(x) = x2
DilationsA dilation makes the graph narrower or wider than the parent graph.
When the parent graph f(x) = x2 is multiplied by a constant "a", the graph of the resulting function f(x) = ax2 is either stretched or compressed vertically.
93 Transformations of Quadratic Functions.notebook
4
March 08, 2014
a.) stretch vertically
b.) stretched vertically and translated down.
c.) compressed vertically and translated up
Reflections
Reflections flips a figure across a line.
Describe the transformation