Average line-of-sight extinction of the host galaxy vs. the stellar mass. Values from SG09 and MN11 have been converted from E(B − V)^gas to E(B − V)^stars using the relation from Calzetti et al. (2000). The dotted-black line is the polynomial fit determined by Garn & Best (2010), and the grey region denotes the uncertainty of 0.3   dex.