<span>designated entire Great Plains as a reservation & defined boundaries for specific tribes</span>
As I am thinking you mean "Producers" when you say "Sellers" I am going to go with, Yes. You are correct it is Supply.
(Also the other one is called Demand not price)
B. correlation of example relationship
56 People
Source: https://www.reference.com/history/many-men-signed-declaration-independence-6fce64817b4b9c01
