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Answer:
m = -1/2
Explanation:
The slope is the ratio of "rise" to "run". The "rise" is the vertical distance between the two points. The "run" is the corresponding horizontal distance.
Vertical distances are positive in the "up" direction, and horizontal distances are positive in the "right" direction for this purpose. Here, the rightmost point is below the leftmost point, so the "rise" is negative.
slope = m = rise/run = -1/2
The slope is ...
m = -1/2