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Functions. What’s a function and what can it look like? …. Created by Rene’ McKibbin. Function – each member of the first set of data is mapped to only one member of the second set of data – for every x there can only be one y. Tables. Function. Function. Not a Function. Tables. - PowerPoint PPT Presentation
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Functions
What’s a function and what can it look like? …
Created by Rene’ McKibbin
Function – each member of the first set of data is mapped to only one member of the second set of data – for every x there can only be one y
Tablesx y
-3 -9
-2 -7
-1 -5
0 -3
1 -1
2 1
x y
10 0
12 1
14 1
16 3
18 4
20 6
x y
1 13
2 11
3 9
4 5
4 1
5 0
Function FunctionNot a Function
TablesFood Drinks
Pizza Coke
Hot Dog Dr. Pepper
Hamburger
Coke
Chicken Sprite
Salad Water
Food Drinks
Pizza Water
Hot Dog Coke
Chicken Mr. Pibb
Pizza Pepsi
Hamburger
Pepsi
Function Not a Function
MAPPINGs
-6
-5
-4
-3
-2
0
1
5
6
9
0
1
2
3
4
11
15
15
10
7
FunctionNot a Function
GraphsNote: If trying to determine if a graph is a function you must do the vertical line test, the line can only pass through the graph one time (red line)
Not a Function
Function
Function
Graphs
Function
Not a Function
Domain & range
Domain – the set of all possible values that can be assigned to the independent variable in a function – your x value
Range – the set of all possible values of the dependent variable in a function – your y value
Ex: (8,9), (-7,12), (0,5), (6,3)domain – {8, -7, 0, 6} or D: {-7 < x < 8}range – {9, 12, 5, 3} or R: {3 < y < 12}