Читать книгу SAT Math For Dummies with Online Practice - Mark Zegarelli - Страница 68

The xy-plane is a mathematical construction defined by a pair of axes, where every point is labeled by a unique pair of points of the form . Figure 2-2 shows the xy-plane.

A wide variety of SAT questions hinge on graphs in the xy-plane. In this section, I refresh you on some basic graphing concepts.