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Answer:
(b) 8y = 7x +6
Explanation:
You can always make a perpendicular line by swapping the x- and y-coefficients, and negating one of them. In the process, ignore the constant.
Swapping the coefficients in the given equation gives you ...
-8y = 7x + constant
Negating the y-coefficient, you get ...
8y = 7x + constant . . . . . the equation of a perpendicular line
Using constant = 6 to match an answer choice, you can see that this matches ...
8y = 7x +6