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Answer:
y=-2x+6
Step-by-step explanation:
So you know the perpendicular gradient is -2 so the equation so far is y=-2x+?
Find the midpoint of AB which is:
(3,0)
Using this, plug it into the equation you've formed:
0= -6 + ?
? = 6
So the equation of the perpendicular line is y=-2x+6