∵点M(3,y)在直线y=-x上,
∴点M(3,y)满足直线方程y=-x,
∴y=-3,
∴M(3,-3);
∴点M关于x轴的对称点是(3,3);
故选B.
点M(3,y)在直线y=-x上,则点M关于x轴的对称点为( ) A.(3,-3) B.(3,3) C.(-3,3) D.(-3,-3)
点M(3,y)在直线y=-x上,则点M关于x轴的对称点为( )
A. (3,-3)
B. (3,3)
C. (-3,3)
D. (-3,-3)
A. (3,-3)
B. (3,3)
C. (-3,3)
D. (-3,-3)
数学人气:368 ℃时间:2020-06-06 17:58:00
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