SFR gradient (∇_SFR) as a function of the SFG metallicity gradient (∇^SFG) for low-mass (upper panel) and high-mass (lower panel) galaxies. Data points represent galaxies classified by the signs of their young stellar and gas metallicity gradients: NN (red circles), NP (green diamonds), PP (blue hexagons), and PN (orange triangles). The error bars associated with ∇_SFR denote three times the bootstrap errors.