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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
Is the perimeter of a square proportional to the side length of the square?
Is the volume of a square proportional to the side length of the square?
Given a table of ratios, watch as we test them for equivalence and determine whether the relationship is proportional.
When going to the movies, is the price you pay proportional to the number of tickets you buy?
A proportionality problem about eating bananas
Practice telling whether or not the relationship between two quantities is proportional by reasoning about equivalent ratios.