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A student found the slope of a line that passes through the points (3, 15) and (5, 9) to be -1/3. What mistake did he make? A. He used the negative reciprocal of the slope. B. He added a negative sign. C. He used the reciprocal of the slope. D. He did not make a mistake. That is the correct slope.

User Halfacht
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you are going right 2 down 6 -2/6
which simplifies to -1/3 so the correct answer is D he made no mistake
User Katherine
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