Recall that a proportional relationship is a relationship between two quantities in which the ratio of one quantity to the other quantity is constant.
Recall that a proportional relationship is a relationship between two quantities in which the ratio of one quantity to the other quantity is constant. The graph of a proportional relationship is a line through the origin.
Recall that a proportional relationship is a relationship between two quantities in which the ratio of one quantity to the other quantity is constant. The graph of a proportional relationship is a line through the origin. When ratios between quantities are not constant, a relationship may be linear but not proportional and the graph does not pass through the origin.
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