SOLUTION: what are the three kinds of proportion and their meanings

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Question 177204: what are the three kinds of proportion and their meanings
Answer by Mathtut(3670) About Me  (Show Source):
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direct variation- which means if one variable increases or decreases so does the other.
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inverse variation which means if one variable is increasing the other is decreasing and vise versa.
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joint variation which means a variable is directly related at least two other variables