Zoom into the under-density range of Fig. 7. The horizontal short-dashed line represents the over-density threshold δ_g = −0.9. The long dashed line shows the linear biasing function , for the value corresponding to the M_B − z − 5log (h) < 19.5 cut, which is listed in Table 2. The dotted line, shown for reference, shows the case b_LIN = 1. Error bars represent the 1σ rms scatter among the mocks. They are only shown for the case M_B − z − 5log (h) < 19.5 to avoid overcrowding.