answer of "whats up"

what is the answer of “whats up” ???

What is (What’s) up? - What is going on?

I do not know what is going on with you. You are the only one to answer.

What is the answer to “Whats up”?[YSaerTTEW443543]

TOEIC listening, photographs: The main pipe line[YSaerTTEW443543]

No, for me what’s up means how are you/how is it going/how are you doing. The answer is simple really, fine, well, not too bad or so.

Thanks for correction

I believe that an answer often isn’t required, you can just say “whazzup” back. Just like “how do you do?”: you’re not supposed to answer, just say “how do you do” back. I guess the underlying function of greetings transcends even social classes.