Question 1202057
Hasty, hasty, hasty!   


Best to just learn how this simple language for "variation" problems works.  One of the least complicated parts of highschool level algebra.


Here's just a little help with #(2).
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b) If the voltage, V, in an electric circuit is held constant, the current, I, is inversely proportional to the resistance, R 
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k, your proportionality constant
Exact transcription is
{{{I=k/R}}}
and it seems your proportionality constant may be  V.
Would make one think therefore  {{{I=V/R}}}