Line luminosities of H₂S 2–1 (top left), HCN 2–1 (top right), HCO⁺ 2–1 (lower left), and CO 1–0 (lower right) of Circinus, NGC 3256, NGC 1068, NGC 253, NGC 4418, and Mrk 231, plotted against the molecular mass of the outflow, M_outflow, taken from Fluetsch et al. (2019). The correlation coefficient between the line luminosity and M_out is given in the upper-left corner of each panel, as is the slope of the line.