Scaling relation between dust and HI masses within r₂₅, in logarithmic scale, for 429 DustPedia late-type galaxies (those with dust and HI mass data). The light blue circles are log(M_HI) detections with error bars drawn in light gray. Red squares with downward arrows show log(M_HI) upper limits. The (black) continuum line is the line fit derived for the plotted 429 galaxies, and the (magenta) dashed line that for the sample galaxies with dust, HI, and H₂ data (252 galaxies, those plotted in both panels of Fig. 3). Equations of the line fits and the Pearson correlation coefficients R are also given in the figure.