61. 【版本一】On XY plane. If a line goes through Point(A,5), Is the slope of the line <0?
a. Line goes through (0, -2)
b. Line goes through (5, A)
【讨论】E
请问思路
61. 【版本一】On XY plane. If a line goes through Point(A,5), Is the slope of the line <0?
a. Line goes through (0, -2)
b. Line goes through (5, A)
1) not sufficient
2) not sufficient, because A could be 5
1)+2) not sufficient, A=5, Slope=5/7>0; A<>5, A=-7, Slope=-1<0
So, E.
