Left panel: observed values of log(M_HI) in the MAGMA sample compared to those predicted as a function of M_star and SFR given by Eq. (9) and shown by a long-dashed line; the 1σ dispersion of the Gaussian is 0.39 dex as discussed in the text. Right panel: observed values of log(M_gas) in the MAGMA sample compared to those predicted by the regression as a function of M_star and SFR and given in Eq. (10); the gray-dashed line corresponds to this regression, and the 1σ dispersion of the Gaussian is 0.31 dex as discussed in the text. Galaxies are colored by gas fraction as shown in previous figures.