SOLUTION: what are the three kinds of proportion?

Question 168258This question is from textbook
: what are the three kinds of proportion? This question is from textbook

Answer by Mathtut(3670) (Show Source): You can put this solution on YOUR website!

I believe there are only 2 kinds
:
directly and indirectly
:
y varies directly with x y/x=k
y varies indirectly with x y*x=k
:
:
a third I suppose would be a mixture or combination of those two
:
:
y varies directly with x and indirectly with z (y*z)/x=k

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