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Example Question #61 : Psat Mathematics
Give the slope of a line perpendicular to the line in the above figure.
Possible Answers:
None of the other responses is correct.
Correct answer:
Explanation:
In order to move from the upper left point to the lower right point, it is necessary to move down 3 units and right six units. This is a rise of and a run of 6. The slope of a line is the ratio of rise to run, so slope of the line shown is
.
A line perpendicular to this will have a slope equal to the opposite of the reciprocal of . This is
.
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