GRE Sample Test 4 Quantitative Reasoning 1

Since this is an all-that-apply question, check each choice systematically.
Choice (A): According to the bottom graph, energy for farm use decreased from 30% to 20% of the total between 1990 and 1995. Since 30 is 50% greater than 20, total energy use would have had to increase by at least 50% to compensate. The top graph shows that it did not, so choice (A) is incorrect.
Choice (B): According to the bottom graph, energy for farm use decreased from 20% to a little more than 10% of the total between 1995 and 2000.
Since 20 is double 10, total energy use would have had to nearly double in order to compensate—that definitely did not happen! Choice (B) is out.
The bottom graph shows that energy for farm use, as a percentage of the total, increased from 2000 onward. Since total energy use increased every year, total farm energy use must have increased also. Thus, without any calculation, you know that choices (C) and (D) must be correct.