Answer:
It's not a curve, but they make it nearly impossible to fail a regents. If you look at some of the old exams, you only have to get 40 points out of 86ish to get a 65. If you were to get 10 points off (5 mult. choice or whatever extended response) you still get an 89. So pretty much, you're not going to fail unless you got more than half of the points off.