MZ residuals for the CALIFA galaxies in S17, rescaled to the Maiolino et al. (2008) N2 calibration, plotted against their SFR in three mass bins. The cyan circles show single galaxies, while the blue points indicate the median in SFR bins with their 1σ dispersion. The red lines indicate the expectations of the FMR for a representative M_* in each bin from M10. Clearly a strong dependency of SFR is present at low mass, decreasing in the higher mass bins, in agreement with the predictions of the FMR.