I need help how do I slove this and how do I figure out the ratio. And could you provide a guide on how you go about finding the ratio I need help please.

Afunction, f(x), represents the height of a plant x months after being planted. students measure and record the height on a monthly basis. select the appropriate domain for this situation. a. the set of all positive real numbers b. the set of all integers oc. the set of all positive integers od. the set of all real numbers reset next