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jsl wrote: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 lines L and K is positive
2) The product of the y-intercepts of lines L and K is negative
OA C
I see where you are coming from but both lines need to pass through (4,3). It limits our choices.jsl wrote:Thanks for the diagam - really appreciate it. However, am still a bit confused in working this one out. When you multiply two slopes together, do you basically get a slope which is in between the two?
Additionally, how do you know if the slope is negative or positive? If you multiply two sets of slopes which have +ve x-coordinates and +ve y-coordinates, you get a negative slope. In the same way, if you have two sets of slopes which have -ve x-coordinates and -ve y-coordinates, you get a negative slope.... does this basically prove the answer is always yes?
