Question 166395
when you have and inverse relation as opposed to a direct proportion it means that as one thing increases the other decreases or vise versa.  so in a direct relationship y directly related to x for instance you have a 

relationship of y/x=k but in an inverse relationship y inversely related to x the y*x=k         so in our problem I*R=k    in this case

(.2)200=40  now we are asked to find I when R=250  so I(250) must equal our constant number which is 40   so I(250)=40 divide by 250 and you get .16

an other way of doing this is to put the ratio of I/I2=R2/R 

so (.2)/I=250/200 {{{I=.16}}}