The party making the 3 point turn is At Fault since they are the operator of the vehicle and has the responsibility for checking whether the way is clear before proceeding.
The one in the back
the guy who backed offcourse
If they backed into you, it's their fault. Failure to yield.
Being a guest in someone's house has nothing to do with car insurance. If someone backs into your car then their car insurance is responsible.
If they wern't going backwards when you hit them you are at fault.
The backing vehicle is at fault. We are always supposed to look to ensure the path is clear before placing our vehicle in motion.
Sounds like Car #1 is at fault
Generally if you back into something it would be the backer's fault, unless both are backing and that will usually be that each would be responsible for their own vehicle damage. You shouldn't intentionally put it into reverse and back into someone that is following to closely. If you are stopped or moving slowly or have to stop sudddenly and they hit you in the rear the tailgater is at fault for following to close.
the person who backed into youyou do not have to back up and if there is someone behind you and you back into them then it is your fault for hitting them and still the first guy's fault for hitting youas far as i know
Generally the person who's car is in motion at the time.
Don't force the wording of the event and I believe the answer to: "...when you back into someone....", is evident. Add to it, "...when exiting a private driveway...", where one is always required to yield to the traffic on the public street.
that would be the person that goes into reverse, because as long as you are stopped it is not your fault. the only possible chance of it being your fault is if you are in motion, but even than it would be a technicality that you could be at fault.