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Proportionalitet
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in mathematics, two variables are proportional if a change in one is always accompanied by a change in the other, and if the changes are always related by use of a constant
Proportionality means that when one thing changes, another thing changes in a predictable way—always by the same ratio or constant. This matters because it lets us predict how one thing will behave based on changes in another, which is useful for everything from cooking recipes to understanding how speed and distance relate to each other.
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Article · Svenska
Inom matematiken är två kvantiteter proportionella om den ena kvantiteten är en konstant multipel av den andra, det vill säga om deras förhållande är konstant.
Abstract from DBpedia / Wikipedia · CC BY-SA