Parallelogram OPQR lies in the xy-plane, as shown in the figure above. The
coordinates of point P are (2, 4) and the coordinates of point Q are (8, 6).
What are the coordinates of point R ?
A (3, 2)
B (3, 3)
C (4, 4)
D (5, 2)
E (6, 2)
这个题直接读图，应该有Q的坐标减去P的坐标等于R的坐标减去O的坐标，其实也就是两个向量是相等的，O又恰好是原点，那么R的坐标就是QP的向量坐标了，即(6,2)E选项