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Mathematics > Standard Multiple Choice

Read the following SAT test question and then click on a button to select your answer. 

In the x y-plane, line l passes through the points 0 comma 0and 2 comma 5. Line m is perpendicular to line l. What is the slope of line m?

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Lines l and m are perpendicular, so the slope of line m is equal to the negative reciprocal of the slope of line l.

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