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is proportional (1,2),(4,8),(10,30)
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False
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(1,2),(4,8),(10,30)
The relationship is proportional if the ratio xy is constant for each pair (x,y).
Check the ratios for each pair
(1,2):12
(4,8):12
(10,30):13
Since xy is not constant for all pairs, the relationship is not proportional.