As the title suggests, I am hoping of the GRE gods could help me clarify the above definition of “Drawn at scale.” While I understand that geometric figures are not necessarily drawn to scale, the circumstance is different regarding coordinate systems.
As ETS states in the Math Convention Guide “Coordinate systems, such as xy-planes and number lines, are drawn to scale. Therefore, you can read, estimate, or compare quantities in such figures by sight or by measurement, including geometric figures that appear in coordinate systems”
Given ETS’s definition, shouldn’t x and y need to be opposite values of one another. So if X were -1, Y would need to be 1. This would strike out B as an answer choice (in the linked problem above).
I don’t think this is a coordinate grid, since a coordinate grid needs to have two axes (horizontal and vertical), while this doesn’t. Secondly it states that this is a “number line” which is definitely different and doesn’t need to be to scale.
There is some confusion on that thread as well, but at this time I believe that Magoosh’s solution is faulty and the answer is D. I’ve followed up on the linked thread as well.
