A15­2RelationsAndFunctions.notebook
September 18, 2014
Algebra 1
Ch.5 Notes Page 24
P24 5­2 Relations and Functions
Sep 2­8:31 AM
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A15­2RelationsAndFunctions.notebook
September 18, 2014
Relations
A Relation is a set of ordered pairs (X, Y)
A Function is a Relation that has one output for each input
(For Each X, There is only One Y).
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A15­2RelationsAndFunctions.notebook
September 18, 2014
Mapping Diagrams
There is no value in the domain that corresponds to more than one value of the range. (Function)
The domain value ­2 corresponds to two range values, ­1 and 1.
(Not a Function)
Nov 11­8:42 AM
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A15­2RelationsAndFunctions.notebook
September 18, 2014
Vertical Line Test
If any vertical line passes through more than one point of the graph, then the graph does not represent a function.
Nov 11­8:46 AM
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A15­2RelationsAndFunctions.notebook
September 18, 2014
Function Notation f(x)
y is the same thing as f(x)
Words used with Functions
y = 3x + 4 f(x) = 3x + 4
Nov 11­8:50 AM
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A15­2RelationsAndFunctions.notebook
September 18, 2014
Making a Table from an Equation (Function Rule)
Make a table for f(x) = 8 ­ 3x
x
8 ­ 3x
f(x)
Nov 11­8:54 AM
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A15­2RelationsAndFunctions.notebook
September 18, 2014
Finding Ranges (Outputs)
f(a) = ­3a + 5
Find the Range of the Function
if the Domain is {­3, 1, 4}
Nov 11­8:58 AM
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A15­2RelationsAndFunctions.notebook
September 18, 2014
HW #26
5­2 P259 #3­6,9­12,17,18,21­23,31­35,37,38
Please put your name and class period at the top of the homework.
Also include the homework number.
Sep 15­2:37 PM
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