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46%
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Please, explain...In the xy-plane, line k passes through the point (1, 1) and line m passes through the point (1, -1). Are the lines k and m perpendicular to each other ?
(1) Lines k and m intersect at the point (1, -1)
(2) Line k intersects the x-axis at the point (1, 0)
(1) Lines k and m intersect at the point (1, -1)
(2) Line k intersects the x-axis at the point (1, 0)
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27 Jan 2010, 15:03
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imagine line K extending from (1,1) intersecting the x axis at 1 ,and reachig point (1,-1) and quadrant IV.
now line M meets k at (1 , -1) but we dont know to which direction its sloping , could be horizontal at y = -1 or it could be -vely sloped . That doesnt tell us whether the 2 lines are perpindiclar
now line M meets k at (1 , -1) but we dont know to which direction its sloping , could be horizontal at y = -1 or it could be -vely sloped . That doesnt tell us whether the 2 lines are perpindiclar
27 Jan 2010, 17:50
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To determine if the lines are perpendicular we need to know the slopes of the two lines. Two points are given for line k but only one point is given for line l so it is impossible to find the slope of line l. The two points help us find rise/run which is the slope.
The lines would be perpendicular if the slops of the two lines are negative reciprocals of each other.
Answer: E
The lines would be perpendicular if the slops of the two lines are negative reciprocals of each other.
Answer: E
