Question

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Which statement about proportional relationships is false?
A proportional relationship must graph as a line
A graph of a proportional relationship must pass through (oo)
Each point (or pair in a proportional relationship must share the same ratio
Each point (or pair in a proportional relationship must share the same difference
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Answer 1

Each point (or pair in a proportional relationship) must share the same difference

Explanation:

The graph of a proportional relation is a straight line through the origin. Such a line has the same ratio of y/x everywhere.

A relation in which the difference is constant will be a straight line, but it won't be through the origin. Such a relation is not proportional.