In this chapter, single-linear-bivariate linear systems will be discussed, and the switching bifurcations for the one-dimensional flows (e.g., sink and source flows and up-parabola and down-parabola flows) will be presented. The increasing-inflection and deceasing-inflection sink and source infinite-equilibriums are for the switching bifurcations of the up-parabola and down-parabola flows.