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Is the relationship shown in the graph at right proportional? If so, use it to complete a Proportions Web. If not, explain why it is not.  

Does the graph go through ? If not, then the relationship is not proportional.

First quadrant graph, x axis labeled, Number of Books Purchased, y axis labeled, Cost in dollars with an increasing line, going through the Points (1, comma 10), (2, comma 14), (3, comma 18), (4, comma 22), and (5, comma 26).