Which graph could represent the amount of granola when selling at a unit rate of R pounds per dollar?

The graph that represents the amount of granola sold at a unit rate of R pounds per dollar would be a straight line originating from the origin (0,0) with a positive slope of R. This indicates that for each dollar spent, R pounds of granola are obtained. As the amount of money spent increases, the total weight of granola increases linearly, reflecting the direct relationship between the two variables.