Im in algebra one and this is just a test review for the test we already took but i need to turn it in because its for a grade and i dont under stand how to do it . the answer choices are

A. Independent – number of car washes, Dependent – frequency of rain

B. Independent – inches of rain, Dependent – cost of car wash

C. Independent – frequency of rain, Dependent – number of car washes

D. Independent – number of car washes, Dependent – time it takes to wash car