Which of the following points is closest to (9, -4)?
(8, 5)
(10, 2)
(5, 5)
(2, -2)
(4, 6)
利用两点间距离公式d=√(x1-x2)2+(y1-y2)2,分别计算各选项与(9,-4)点之间的距离,可知本题应该选择B项。