Molecular gas mass scaling relations. From left to right: M_H2 vs. M_⋆, SFR, and M_dust. Data are color coded for the sSFR. The best-fit parameters for each scaling relation are reported in the upper-left corner, while the best-fit line is represented with a solid black line. The intrinsic dispersion (δ) is reported in the lower-right corner, followed by the correlation coefficients (namely, P and K).