Hi All,
This question asks for a line that is perpendicular to the line Y = (1/2)(X) + 2.
When graphing lines, it's often easiest for most Test Takers to put the line in slope-intercept 'format' (the same format as the one used in the given equation above). Perpendicular lines have slopes that are 'opposite inverse' (sometimes called 'negative reciprocal'), so we're looking for a line that has a slope of -2 (since the opposite of a positive is a negative and the inverse of 1/2 is 2).
Rather than convert all 5 answer choices to slope-intercept format, we can use some patterns to our advantage. To start, the slope will have to be NEGATIVE. Eliminate Answers A and D (their slopes will be positive). With the remaining 3 answers, we have:
B: Y = (1/2)X + 5/2
C: Y = -2X + 4
E: Y = (-1/2)X -2
Final Answer:
GMAT assassins aren't born, they're made,
Rich
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