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Identifying proportional relationships
Learn how to tell whether two quantities are proportional by thinking about equivalent ratios and drawing graphs.
The relationship between two variables is proportional if
Given a table of ratios, watch as we test them for equivalence and determine whether the relationship is proportional.
Practice telling whether or not the relationship between two quantities is proportional by reasoning about equivalent ratios.
Learn how to tell proportional relationships by drawing graphs. Key idea: the graph of a proportional relationship is a straight line through the origin.
Practice telling whether or not the relationship between two quantities is proportional by looking at a graph of the relationship.