Question: a type of variation such that as one variable increases the other decreases
[{'answer': 'inverse proportionality', 'provenance': [{'wikipedia_id': '81863', 'title': 'Proportionality (mathematics)', 'start_paragraph_id': 18, 'start_character': 16, 'end_paragraph_id': 18, 'end_character': 39, 'bleu_score': 1.0, 'section': 'Section::::Inverse proportionality.\n'}]}, {'provenance': [{'wikipedia_id': '81863', 'title': 'Proportionality (mathematics)', 'start_paragraph_id': 18, 'start_character': 0, 'end_paragraph_id': 18, 'end_character': 396, 'bleu_score': 0.965203995518735, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9445931436369218516}, 'section': 'Section::::Inverse proportionality.\n'}]}]