Divya Ann Chacko wrote:In the xy coordinate plane, is point R equidistant from points (-3,-3) and (1,-3)?
1) The x coordiante of point R is -1
2) Point R lies on the line y=-3
Target question:
Is point R equidistant from points (-3,-3) and (1,-3)?
This question is a great candidate for rephrasing the target question.
Aside: We have a free video with tips on rephrasing the target question:
https://www.gmatprepnow.com/module/gmat- ... cy?id=1100
First sketch the two given points
Notice that the point (-1, -3) is equidistant from the two given points. MORE IMPORTANTLY, every point on the line x = -1 is equidistant from the two given points.
So, we can rephrase the target question . . .
Rephrased target question:
Is point R on the line x = -1?
Statement 1: The x coordinate of point R is -1
If the x-coordinate is -1, then
point R is definitely on the line x = -1
Since we can answer the
target question with certainty, statement 1 is SUFFICIENT
Statement 2: Point R lies on the line y= -3
This tells us nothing about whether or not
point R is on the line x = -1?
Since we cannot answer the
target question with certainty, statement 2 is NOT SUFFICIENT
Answer =
A
Cheers,
Brent
