DEPRECATED Constructing and comparing proportional relationships

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Problem

The table shown below describes the relationship between total income and the amount of tax deducted from it.
Income left parenthesis, dollar sign, right parenthesis500100020004000800016, comma, 000
Tax left parenthesis, dollar sign, right parenthesis11523046092018403680
The relationship between total income and the amount of tax deducted from it is a proportional relationship.
Which of the correct statements is sufficient for establishing that the relationship is indeed proportional?
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