If line joining (1, 2) and (7, 6) is perpendicular to line joining (3, – McqOptions

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1.	If line joining (1, 2) and (7, 6) is perpendicular to line joining (3, 4) and (11, x).
A.	12
B.	16
C.	-16
D.	-12
Answer» D. -12

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