alleryTwo sequences of numbers are directly proportional if their matching elements have a constant
Atotal
Bgap
Cproduct
Dratio
Answer & Solution
Correct answer: D. ratio
1. Pair up corresponding elements of the two sequences.
2. If each pair has the same quotient, the sequences are directly proportional.
3. A constant sum or product would describe other relations.
_Source: Wikipedia, Proportionality (mathematics), lead section_
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