Distribution of metallicity gradients as a function of the t₅₀ (top panels) and t₉₀ (bottom panels) for our sample of dwarf galaxies. The dashed blue lines represent the LSQ fit to the data and the blue shaded areas show the associated 95% confidence interval. On the y-axes, we plot the metallicity gradients in units of the 2D SMA half-light radius (left panels) and in units of the physical radius (right panels). In the legend boxes we report the slope value from the LSQ fits. Dwarf galaxies that may have experienced a past merger event are marked with an open circle.