A passenger rode the subway 2 blocks west and then 10 blocks south. If all the blocks are the same length, what is the value of the slope of the line from where the passenger began to where he finished?

Slope is the change in the vertical direction divided by the change in the horizontal direction. The passenger moved 10 blocks south and 2 blocks west, so the slope is (-10)/(-2) = 5. The correct choice is 5.

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