The graph shows a proportional relationship between the number of books sold at a yard sale and the amount of
money collected from book sales.
Book Sales Revenue
30 12
27
24
21
18
Revenue in dollars
15
12
3
4 8 12 16 20 24 28 x
Number of books sold
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The graph shows a proportional relationship between the number of books sold at a yard sale and the amount of money collected from book sales Book Sales Revenue class=