1. The problem statement, all variables and given/known data Find the instantaneous rate of change for the function y2+(xy+1)3=0 at (2,-1) 2. Relevant equations N/A 3. The attempt at a solution I tried getting it into a "y=" format but I don't really understand how to deal with the y when it's squared in one part and cubed in the other. This is as far as I could figure: y=(-(xy+1)3)1/2 Thanks for any help!