已知点M(3,-2)与点M′(x,y)在同一条平行于x轴的直线上,且M′到y轴的距离等于4,那么点M′的坐标是( ) A.(4,2)或(-4,2) B.(4,-2)或(-4,-2) C.(4,-2)或(-5,-2) D.(
问题描述:
已知点M(3,-2)与点M′(x,y)在同一条平行于x轴的直线上,且M′到y轴的距离等于4,那么点M′的坐标是( )
A. (4,2)或(-4,2)
B. (4,-2)或(-4,-2)
C. (4,-2)或(-5,-2)
D. (4,-2)或(-1,-2)
答
∵M(3,-2)与点M′(x,y)在同一条平行于x轴的直线上,
∴M′的纵坐标y=-2,
∵“M′到y轴的距离等于4”,
∴M′的横坐标为4或-4.
所以点M′的坐标为(4,-2)或(-4,-2),故选B.