help me i dont understand this

The equation of the line passing through the coordinates but with its coordinates interchanged i.e (5, 7) and (9, 11)
Given a linear function that contains the coordinate point on its line (5, 7) and (9, 11)
The equation of its reciprocal can be determine by finding the equation of the line passing through the coordinates but with its coordinates interchanged i.e (5, 7) and (9, 11)
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