Farmer Ben knows that feeding a grain supplement to his cows will produce more milk according to the following schedule: Total Pounds.....................Total Extra Pounds of Supplement Used.....................of Milk 1.....................................................5 2.....................................................9 3..................................................12.3 4..................................................15.5 5....................................................18 6.................................................. 20 7..................................................21.5 8..................................................22.5 9....................................................23 Ignoring all other issues, how many pounds of grain supplement should Farmer Ben feed his cows if the price of milk is $0.20 per pound and the price of grain supplement is $0.70 per pound?

		9
		2
		1
		4
		8
		5
		3
		7
		6