Dependence of the dark matter fraction on the baryonic surface density for galaxies in the local Universe predicted by Illustris-TNG100 simulations (Nestor Shachar et al. 2023, Fig. 5). This relation is compared with the one obtained from the five parameters with the highest relative importance in the RF. provides a good fit for the theoretical relation. Two additional relations for the dependence of f_DM on Σ_⋆ from different simulations are also included (Oser et al. 2010; Remus et al. 2017).