# Function machines - Web Maths_ by gegeshandong

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• pg 1
```									Match up the table with the function machine, reverse
machine and rule in algebra
Input          Output           Input          Output
7              10                6             12
2               5               10             20
11                                8
8                               4

Input          Output          Input          Output
1              5               7              4
4             11              11              6
6                             21
23                             5

Input          Output          Input          Output
21              3               8             20
63              9              10             30
49                             11
8                             10

Input          Output          Input          Output
50              5              20              2
22             2.2              6             -5
31                              8
6.7                            -1

RULES IN ALGEBRA
y= x - 8                 y= x + 1          y=2x+3
2                          2

y= x                       y=2x           y=x+3
7

y= 5(x-4)               y= x
10

Can you write the reverse rules in algebra?
FUNCTION MACHINES

IN         ÷2        -8   OUT

IN         ÷7       OUT

IN         +1        ÷2   OUT

IN         -4        x5   OUT

IN        ÷10       OUT

IN         x2       OUT

IN         +3       OUT

IN         x2        +3   OUT

REVERSE MACHINES

IN         ÷2       OUT

IN         x2        +8   OUT

IN         x7       OUT

IN         +3       OUT

IN         -1        x2   OUT

IN         +4        ÷5   OUT

IN        x10       OUT

IN         ÷2        -3   OUT

```
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