(a) The relation between the amplitude of variability and the synchrotron peak frequency luminosity; (b) the relation between the amplitude of variability and IC peak frequency luminosity; (c) the relation between the amplitude of variability and Compton dominance parameter. The red dot represents FSRQs. The blue dot represents BL Lacs. The green dot represents BCU. The cyan dot represents NLS1. Shaded gray areas correspond to 1σ confidence bands. The black line is the best fit.