The quantity in pounds of a gourmet ground coffee that is sold by a coffee company at a price of p dollars per pound is Q f p a What is the meaning of the derivative f 7 O The rate of change of the quantity of coffee sold with respect to the price per pound when the price is 7 per pound The rate of change of the price per pound with respect to the quantity of coffee sold when the price is 7 per pound O The price of the coffee as a function of the supply O The rate of change of the price per pound with respect to the quantity of coffee sold O The supply of coffee needed to be sold to charge 7 per pound b What are the units of f 7 O pounds dollar Odollars pound Odollars pound pound O pounds dollars pound Odollars pounds