Describe ways in which the gold/salt trade is an example of compromise and negotiation over the availability of resources

If you could choose between a pile of salt and a pile of gold, you would probably choose the gold. After all, you know that you can always buy a container of salt for about forty-five cents at the local supermarket. But what if you could not easily get salt, and without it you could not survive? In fact, throughout history salt has been very difficult to obtain in many parts of the world, and people feared a lack of salt the way we in the industrialized world fear a shortage of fuel oil.

well considering i can't see the graph, it's probably prices

your answer is rising unemployment and inflation.