Variables and (, ) are inversely proportional to one another if one variable- for example, - is proportional to the reciprocoal of the other variable- .
In other words, if and (, ) are inversely proportional to one another, there would exist a constant () such that:
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The value of is constant and is independent of and . Given that when , rearrange the equation above to find the value of :
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Rewrite the equation again to find in terms of (which doesn't change) and (which might change):