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Which table or tables below show a proportional relationship? Justify your answers.  

A proportional equation can be written using an equation of the form .

Based on the equation above, a relationship that is proportional must contain the point and have a constant rate of growth represented by a constant, .

Which of these tables has these attributes?

Rearranging the ordered pairs so the -values are listed from smallest to largest -values may be helpful.

Table (b) could contain the point and grows at a constant rate.