I have the following eigenvalues: r_1 = 4, r_2 = 2, which gives me the eigenvectors v_1 = [1, 1] and v_2 = [1,3] for r_1 and r_2 respectively. How should I draw the phase plane for this? This gives me two vectors that both approach infinity when t -> infinity? I've tried to find an example problem that draws the phase plane for this with no success. If anyone could either explain and/or point me to an example with this type of eigenvalues/vectors then that would be great. Thanks. :-)