Edge-on projection of the FP in the B-band fitting the galaxies at z < 0.35 (left) and fitting the data at z > 0.35 (right). The black points represent the galaxies with z < 0.35, and the open red diamonds are the objects with z > 0.35. The galaxies in each redshift range are fitted using the parameters a and b obtained for local galaxies from the literature. The zero-point (ZP) and the rms scatter (σ_tot) are shown in both cases.