Geometry

Question Analysis:
This question involves calculating the slope of a side of a quadrilateral using the slope formula in coordinate geometry.
The main focus is on accurately identifying the coordinates of the two endpoints of the side and applying the slope formula.

Key Concept Explanation:
The slope formula for a line segment with endpoints and is .
The slope indicates the steepness and direction of the line segment.

Step - by - Step Solution:
1. Identify the coordinates for points and :
  - For point , ,

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