Line A is drawn on a rectangular coordinate plane. If the coordinate pairs (3, 2) and (-1, -2) lie on line A, which of the following coordinate pairs does NOT lie on a line that is perpendicular to line A?
(5, 8) and (4, 9)
(3, -1) and (4, -2)
(-1, 6) and (-4, 9)
(2, 5) and (-3, 2)
(7, 1) and (6, 2)
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Line A is drawn - coordinate..MGMAT
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rommysingh
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Slope of line A = (y2 - y1)/(x2 - x1) = 1
Product of slopes of two perpendicular lines = -1
This implies that the slope of line perpendicular to A = -1
Now, just use the above formula to find a slope which is NOT -1
Answer is D
Product of slopes of two perpendicular lines = -1
This implies that the slope of line perpendicular to A = -1
Now, just use the above formula to find a slope which is NOT -1
Answer is D
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Kanwar
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Kanwar
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