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137 bytes removed ,  16:50, 7 March 2021
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* linear - results in average values;
 
* linear - results in average values;
 
* logarithmic - results in smaller values;
 
* logarithmic - results in smaller values;
* power functions - results in larger values;
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* power functions - results in larger values, but goes through (0,0);
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In the graph for Maroc a logarithmic function is used. The largest cities are not used in the fit calculation, as these ones seem not to follow the curve. They would bias the fit to much, when we use so few points. The fit will result in a transportation size of 419 km. Compare this to a maximum actual distance of about 1000 km.
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In order to get a handle on this choice, a plot has been created for the departments in France. With a population fraction of 80%, the power function gives the best fit.
    
== Result ==
 
== Result ==
3,393

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