Comparison between the Primary and Secondary samples in MaNGA regarding their distribution in the SFMS (top) and MZR (bottom) relations. In both panels the black points correspond to all galaxies in the sample, while the red lines (averaged SFMS and MZR) and contours (35%, 65%, and 95%) represent the EW_Hα-selected star-forming galaxies used to measure the relations. Orange contours indicate no further selection based on the MaNGA target selection, while the blue and green contours represent, respectively, the Primary and Secondary samples.