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Question 401989: tell whether each equation represents direct or inverse variation:
y=80x
xy=80
y=80/x
y/x=80
Answer by richard1234(7193)   (Show Source):
You can put this solution on YOUR website! The first and fourth equations are equivalent, and they represent direct variation because when x increases, y also increases by the same ratio. The second and third equations are equivalent and they represent inverse variation because when x increases, y decreases (and vice versa).
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