R_mol against P_DE. Left: shown here is an enlarged version of panel 5 from Figure 9, with the fit now performed over the entire sample (purple line) with the corresponding 3σ confidence interval (purple shaded region). The black, grey, and pink lines show literature fits adopted from Sun et al. (2020a), Leroy et al. (2008), and Blitz & Rosolowsky (2006), respectively. Right: Comparison between (i) R_mol and P_DE estimates from Sun et al. (2020a) for three overlapping galaxies (grey markers) and (ii) our derived R_mol and P_DE (colored markers). The different shapes of the markers correspond to different galaxies.