In the xy-coordinate plane, line L and line K intersect at point (4,3). Is the product of their slopes negative?
(1) The product of the x-intercepts of lines L and K is positive
(2) The product of the y-intercepts of lines L and K is positive
How did you guys go about solving this?
For me...
??? (slope of L)*(slope of K) = negative number ???
--> the question is asking whether exactly one of the slopes is negative
(1) INSUFF both x intercepts could be positive or both negative
(2) INSUFF either y intercept of L is negative and for K positive or vice versa
I don't understand why together the statements are sufficient. Together, i come up with four possible scenarios but still not definite that one slope is negative.
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