Flow Charts
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Flow charts show a set of instructions which are to be followed. When you put a value into the start of the flow chart and follow the results you should get a result.
Flow charts are made up of boxes, each with their own function. The shape of the box shows what it is doing.
 | Used to show the start or end of a sequence |
 | Contains the instructions you follow |
 | These are decision boxes which contain yes or no questions |
These boxes are joined together by arrows which shows the direction you have to follow the instructions.
An example of a simple flow chart follows:
If you think of a number and follow the flow chart you would get a new result.
If you think of the number 2, you would:- add 5 td 2 to get 7
- multiply 7 by 3 to get 21
You can get the same result by using the equation y = 3 ( x + 5 ). Where x is the number you put in and y is the result. As a function, it would be seen as: f(x) = 3 ( x + 5 )
When looking at the equation you can easily change the subject:
y = 3 ( x + 5 )y / 3 = x + 5
y / 3 - 5 = x
This means the inverse function is: f-1(x) = x / 3 - 5
This can be made into an inverse of a flow chart:
If you think of a number and follow the flow chart you would get a new result.
If you think of the number 21 from the first result, you would:- divide 21 by 3 to get 7
- subtract 5 from 7 to get 2
The inverse has returned the number back to what the subject used to be.
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by: Admin
Total views: 554
Word Count: 485
Date: Thu, 14 Sep 2006 Time: 12:00 AM
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