Based on your description of the graph measuring the costs of Seed Mix A and Seed Mix B, it seems that the lines representing the costs of the two seed mixes start from the same point (the origin) and increase as the number of bags increases.
To determine which statement is true, I would need to know the precise prices at which these seed mixes are sold. However, based on the information provided, if the lines representing the costs are parallel and maintain a constant relationship, then the true statement could be "Seed Mix A and Seed Mix B cost about the same."
If you can provide specific prices or a clearer description of the lines, I’d be able to give a more definitive answer.