Rates and Related Rates!!

A voltage V across a resistance R generates a current C = V/R. Suppose a constant voltage of 9 volts is put across a resistance that is decreasing at a rate of 0.3 ohms per second when the resistance is 4 ohms.

(a) At what rate is the current changing?

dC/dt =

(b) Is the current increasing or decreasing?

ok so if someone could like do explain how to do this problem that would help alot, i think you have to use the derivative of t somewhere in there...please help thanks

mathlete