Use differentials to approximate the quantity. (Round your answer to four decimal places.) V 65.1 And answer the following questions. a) In order to use the differential, we need a function. What is the most appropriate function for this problem? y = b) What is the differential of this function? dy = C) What is the most appropriate value for x? d) What is the corresponding value of dx? e What is the corresponding value of dy? (Round your answer to four decimal places.)