Consequences of quantifying the total H₂ of the DGS sample. a: Schmidt–Kennicutt relationship and Bigiel et al. (2008) revisited. Solid black squares are the values when the M_H2 is calculated from the CO-to-H₂ standard conversion factor; solid red dots are the total H₂ determined from our self-consistent models. The dashed line is the usual Schmidt–Kennicutt relation, where low-Z star-forming dwarf galaxies are normally outliers when CO is used to determine the H₂ (Cormier et al. 2014). The dotted line is the Bigiel et al. (2008) relationship determined for the Σ_SFR − Σ_gas relationship. b: α_CO as a function of Z from Schruba et al. (2012; black dotted line), Glover & Mac Low (2011; long black dashed line), Accurso et al. (2017a; blue dashed line), Amorín et al. (2016; green dashed line), Genzel et al. (2015; short black dashed line), Tacconi et al. (2018; orange dashed line), Bolatto et al. (2013; pink dashed line), and our new α_CO − Z relationship determined from this paper (red dashed line). Red solid dots are the total H₂ determined from our self-consistent models in this paper. Also given in the panel is the derived expression to determine α_CO as a function of Z from this new relationship, which has a standard deviation of 0.32 dex. c: X_CO conversion factor from this paper and Σ_SFR. Spearman correlation coefficients (ρ) and p-values in parenthesis are indicated within each panel. Red dots are DGS galaxies with CO detections. Open symbols in all panels are upper limits due to CO non-detections.