Help me!! i am freaking out because my root ball just broke apart from my tomato plant stem when transplanting?

i was transplanting three 5/6 inch tomato plants into large pots and one of them broke apart from its root ball completely!! i think i pulled too hard to get it out, it was my first time transplanting and i was very carefull with the other two and they came out just fine. is that plant ruined forever? its for a project and i need to know if i should go talk to my teacher. it was the plant that was growing the best, please give me advice, thanks!! :'(