If we have less power, we most likely have
the same amount of work being done over a shorter period of time.
more work done over a shorter period of time.
more work done over the same amount of time.
the same amount of work being done over a longer period of time.

If we have less power, then we could have less work done
in the same amount of time, or we could have the same
amount of work being done over a longer period of time.
In either case, the quotient of
                                                       work / time
would be a smaller number.

Independent variable is something that is changed in a experiment. 

Go to the bathroom and vape