0

I am trying to express the following idea: "studying the variation of function f1 and the variation of function f2 w.r.t. the number of active users N is essential for ....". Note that we can use these functions instead of f2 and f1. Here is my attempt:

Studying the variation of these rate functions w.r.t. the number of active users N is essential for ...

In this attempt, should I use variation or variations? is or are ?

3
  • Variation can be either a process or a result. So, the answer depends on what you study, the process of making changes to the function, or the multiple results of applying those changes. – Victor Bazarov Nov 9 '15 at 15:38
  • @VictorBazarov I am not sure I understand your point. Could you please elaborate on that a little further ? – tam Nov 9 '15 at 15:48
  • Example: "the function is subject to variation due to..." -- in this case it's a process, and is singular. Or, "in our experimentation with initial conditions we found at least three variations of the function..." -- here it's the result, and is plural. – Victor Bazarov Nov 9 '15 at 15:57
1

This depends on how many differences are there between the two functions.

If there is a single difference use the singular 'variation' and 'is' otherwise use 'variations' and 'are'

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.