2D graph theory puts male and female on perpendicular axis of a graph with each axis ranging from 0(not that gender at all) to 1(fully that gender). Under this model agender is at the origin. bigender, girl coboy and other genders that are both fully female and fully male maximum X and Y position. Androgyne is somewhere in middle with positive x and y value. Neutrois lies somewhere around the diagonal with relatively equal amounts of male and female. There is one notable variation which extends the axis to -1 which represents the antigender of that gender.