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Two lines meet at 45°, and one has slope 1/2. Which could be the slope of the other?
A2
B1/3
C−3
D3
Answer & Solution
Correct answer: D. 3
Setting |(m − 1/2)/(1 + m/2)| = 1 gives m = 3 or m = −1/3, and only 3 is listed.
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