A11­4PatternsAndFunctions.notebook
Algebra 1
Ch.1 Notes Page 22
P22 1­4 Patterns and Functions
September 15, 2014
Functions
A Function is a relationship that has exactly one (y) output value for each (x) input value.
X is called the Control or Independent Variable (Input)
Y is called the Dependent Variable (Output)
Y depends on X
Sep 2­8:31 AM
Oct 21­7:28 AM
Write a Function Rule
for the Following Information
A Function rule is an equation that describes a functional relationship.
For Every Value of X,
There is only ONE Value of Y.
y = 3x + 2
x y
1 3
2 6
3 9
4 12
Nov 4­8:35 AM
Domain and Range
Domain values are the x (independent) values of a function
x y
1 5
2 8
3 11
4 14
Apples Cost
1 .35 2 .70
3 1.05
4 1.40
Nov 4­8:39 AM
HW24
(1­4) P29 #1­8
Range values are the y (dependent) values of a function
55
Nov 4­8:53 AM
Sep 15­12:11 PM
1