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How can I point out the relation between 3 variables? I want to point out the relation between (A, B) and (C). e.g., in the relation bellow, C depends both A and B.

C = 2 * A + B

Is the phrase bellow correct?

the relation between A as well as B and C
  • Go for the simplest phrasing possible: the relation between A, B and C. – Michael Rybkin May 18 '18 at 10:02
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    To avoid any possible confusion we use brackets in actual equations. For a text-based format, use something like the relation of C to both A and B. – FumbleFingers May 18 '18 at 13:37
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The phrase is correct, but jarring and overcomplicated


The phrase you're asking for, does join the three terms together in a grammatically correct way. However, it is a real mouthful to speak and most people would tend to a simpler alternative.

What you asked in the opening question:

I want to point out the relation[ship] between (A, B) and (C)

Works well to describe the situation.

That said, these phrases will likely suggest that there is a relationship between all three (A, B and C). Which is technically correct, but perhaps not the focus you want to give.


Instead, to focus on the specific relationship between (A,B) and (C) - I'd suggest a phrase along the lines of:

C's dependency on A and B

or

The dependency of C on A and B.

Which is a specific type of relationship - and conveys the specific situation more clearly.

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    Or, most simply, "C is a function of A and B." – Canadian Yankee May 18 '18 at 11:11

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