Relation between the SFR and M_⋆ for SDSS star-forming galaxies, along three stellar mass bins for the whole mass range (8.5 ≤ log (M_⋆/M_⊙) ≤ 11.5) and for six redshift ranges in the range 0.005 ≤ z ≤ 0.22. The black solid line represents the fit to the running median for bins of 1000 objects in this work for each redshift range. Red dots represent the medians of SFR and M_⋆ per stellar mass bin and redshift range. The error bars in x- and y-axis represent the ±1σ confidence interval for stellar mass and SFR, respectively. The symbol sizes increase with the number of objects contained in each mass range.