A line passes through the points $$ (3, 1) $$ and $$ (7, 9) ...

Question Analysis
This question tests the student's ability to calculate the slope of a line given two points and then determine the slope of a perpendicular line.

Key Concept Explanation
Perpendicular lines have slopes that are negative reciprocals of each other. The slope of a line passing through points and is given by .

Step-by-step Solution
1. Identify the coordinates of the points:

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Algebra-1

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