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Note that Quantity A is greater in Figure 2 and Quantity B is greater in Figure 3.  Thus, the correct answer is Choice D, the relationship cannot be  determined from the information given.  5.  2 y = 2x + 7x ? 3  Quantity A Quantity B  x y  !A Quantity A is greater.  !B Quantity B is greater.  !C The two quantities are equal.  !D The relationship cannot be determined from the information given.  Explanation  If then so in this case, but if then 2 x = 0, y = 2(0 ) + 7(0) ? 3 = ?3, x > y; x = 1,  so in that case, 2 y = 2(1 ) + 7(1) ? 3 = 6, y > x.  Thus, the correct answer is Choice D, the relationship cannot be  determined from the information given.  Note that plugging numbers into expressions may not be conclusive. It is conclusive,  however, if you get different results after plugging in different numbers: the conclusion is that the relationship cannot be determined from the information given. It is  also conclusive if there are only a small number of possible numbers to plug in and  all of them yield the same result, say, that Quantity B is greater.  Now suppose that there are an infifinite number of possible numbers to plug in. If  you plug many of them in and each time the result is, for example, that Quantity A  is greater, you still cannot conclude that Quantity A is grea

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