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find the slope determined by pair of points 5 2 7 6

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Find the slope determined by pair of points (5,-2) (7,-6)

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Answer to a math question Find the slope determined by pair of points (5,-2) (7,-6)

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m = -2

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-6 - t / 4 = -1

4m - 3t + 7 = 16

Let f(x)=-1/2x+5 evaluate f(-6)