A student measures the absolute pressure \(P\) as a function of depth \(h\) for three different incompressible liquids (Liquid 1, Liquid 2, and Liquid 3) held in open containers. The data for each liquid are shown in the graph. All three containers are located in the same laboratory.

Based on the graph, what is the ratio of the density of Liquid 3 to the density of Liquid 1, \(\dfrac{\rho_3}{\rho_1}\)?