Q. In the xy plane, what is the y intercept of Line L
1. The slope of line L is 3 times its y intercept
2. the x intercept of line L is -1/3
Gmat Prep question 2
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I think it is E
1) Y=3m(x)+m - doesn't allow us to conclude one value for m. - INSUFFICIENT
2) no slope given - INSUFFICIENT
Together statement 2) doesn't provide incremental information (see below) to statement 1, still insufficient.
If we look for X intercept using just statement 1) we find:
0=3mx+m
x=-1/3
So no new information with statement 2
1) Y=3m(x)+m - doesn't allow us to conclude one value for m. - INSUFFICIENT
2) no slope given - INSUFFICIENT
Together statement 2) doesn't provide incremental information (see below) to statement 1, still insufficient.
If we look for X intercept using just statement 1) we find:
0=3mx+m
x=-1/3
So no new information with statement 2
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What if we were given explicity that the slope is positive (or that its negative)
Would that be of any help ?
Would that be of any help ?
I don't think knowing just the sign alone would help. If I understand the problem correctly we need the direction and the magnitude to help us extrapolate the Y intercept based on the information provided in statement 1.
As for statement 2, knowing the direction alone still provides an infinite number of possibilities for lines that we can draw from an x-intercept of -1/3.
As for statement 2, knowing the direction alone still provides an infinite number of possibilities for lines that we can draw from an x-intercept of -1/3.