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Calculate the slope m, if defined, of the straight line through the given pair of points. Try to do the problem without writing anything down except the answer. (If an answer is undefined, enter UNDEFINED.) (6, 5) and (7, 2)

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altavistard
m is defined as rise over run. Here the rise is 2-5 and the run is 7-6, so the slope is -3/1 = -3. Could you do this problem in your head? 

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