At a price of $2.22 per bushel. the supply of a certain grain is 7300 million bushels and the demand is 7700 million bushels. At a price of $2.33 per bushel, the supply is 7700 million bushels and the demand is 7600 million bushels. (A) Find a price-supply equation of the form p = mx + b, where p is the price in dollars and x is the supply in millions of bushels. (E) Find a price-demand equation of the form p = mx + b, where p is the price in dollars and x is the demand in millions of bushels. (C) Find the equilibrium point. (D) Graph the price-supply equation, price-demand equation, and equilibrium point in the same coordinate system~ (A) the once-supply equation rs p = LI- ' (Type an exact answer.) (B) The price-demand equation is p = E]. (Type an exact answer.) (0) The equilibrium point is 1:] (Type an ordered pair. Type an exact answer. Use integers or decimals for any numbers in the expression.) (13) Choose the correct graph below