Hey guys, Been struggling with this all day. I've got the following situation: x1*=-x1+x2 x2*=-2x1-x2 Where the 1&2 after the x are subscripts. Now i can find the equilibrium no trouble: (0,0). I also know, by looking at the eigenvalues that it is a sink. But how on earth do you sketch it? I've found nullclines: -x1+x2 = 0 -2x1-x2 = 0 But i cannot, for the life of me, tell which way these lines are going. Help really appreciated.