In the XY-coordinate plane, line L and line K intersect at the point (4,3). Is the product of their slopes negative?
1) The product of the x-intercepts of line L and K is positive.
2) The product of the y-intercepts of line L and k is negative.
I clearly understand concept of +ve / - ve slope and perpendicular/parallel lines. using those information I can say (1) & (2) alone is insufficient.
Now by using y intercept, how we are concluding that product of two lines slope is negative? By the way answer to this DS is "C".
Note:I know we can go by algebric method but that is very time consuming for this kind of question.
1) The product of the x-intercepts of line L and K is positive.
2) The product of the y-intercepts of line L and k is negative.
I clearly understand concept of +ve / - ve slope and perpendicular/parallel lines. using those information I can say (1) & (2) alone is insufficient.
Now by using y intercept, how we are concluding that product of two lines slope is negative? By the way answer to this DS is "C".
Note:I know we can go by algebric method but that is very time consuming for this kind of question.
