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01 Jan 2020, 03:17
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C
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Difficulty:
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Question Stats:
79% (01:24) correct
21%
(01:43)
wrong
based on 133
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[GMAT math practice question]
A line passes through two points (\(a, -2\)), and (\(2a-6, 2\)). This line is parallel to the y-axis. What is \(a\)?
A. \(2\)
B. \(4\)
C. \(6\)
D. \(8\)
E. \(10\)
A line passes through two points (\(a, -2\)), and (\(2a-6, 2\)). This line is parallel to the y-axis. What is \(a\)?
A. \(2\)
B. \(4\)
C. \(6\)
D. \(8\)
E. \(10\)
01 Jan 2020, 08:59
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As the line is parallel to the Y-axis, the x-coordinate should be constant throughout (if any pair of points is selected from the line, the x-coordinate of the points will be the same).
So, 2a-6 = a => a=6 (C)
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So, 2a-6 = a => a=6 (C)
Posted from my mobile device
01 Jan 2020, 09:41
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MathRevolution
Since the line is parallel to y-axis, it’s x-coordinate will be constant
a= 2a-6
a=6
IMO C
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