Coefficients of the FP at different redshift for Illutris-1 (left panel) and IllustrisTNG-100 (right panel). The coefficients are obtained from 500 fits of the FP created with a random sample of 200 galaxies. The color of the dots indicate the values for different range of masses: red dots (log(M_s/M_⊙) > 11), blue dots (log(M_s/M_⊙) > 10), green dots (log(M_s/M_⊙) > 9), black dots (log(M_s/M_⊙) > 8), magenta dots (log(M_s/M_⊙) > 7).