Geometry

Question Analysis
This question tests the understanding of the condition for perpendicular lines, which is that the product of their slopes must be -1.

 

Key Concept Explanation
Slope formula:
Two lines are perpendicular if the product of their slopes is -1. ()

In other words, the slope of a line perpendicular to another line is the negative reciprocal of the original slope. ()

 

Step-by-step Solution
1. Identify the slope of the line from the graph.
2. Calculate the slope of Line A with points (1, -2) and (3, 1): 

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