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Plant A si 18 inches tal after one week, 36 inches tal after two weeks, 56 inches tall after three weeks. Plant B si 18 inches tall after one week,36 inches tall after two weeks,54 inches tall after three weeks.Which situation represents proportional relationship between the plants height and number of weeks?

User Kahowell
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Plant A represents a proportional relationship. 
User Timothy Perrigo
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