I would counsel you to contact the state family services department in whatever state you live in. As far as I know it is illegal to hit a minor in most states. Just by you asking the question, can you hit your parents. It tells me you and your parents need counseling or separation.If you have another question about this, write me. Please do not do anything rash.
Your parents SHOULD NEVER hit you! I would probably ht them back but you might have to analyse the situation better it will make them angrier and remember they are most likeky stronger than you and it might make the situation worse. Be rash. You should talk to someone you trust and if it cotinues you should seriously consider legal charges.