Mr. Weber drives to a landscape supply center to buy sand and gravel. He needs at least 2 lb of sand. The amount of gravel he will buy will be at least twice the amount of sand he will buy. The center has 6 lb of sand and 13 lb of gravel in stock.
The graph shows the feasible region, where x represents the number of pounds of sand and y represents the number of pounds of gravel.
Which ordered pairs meet all the constraints and make sense in the context of the situation?
Select each correct answer.
(4,6)
(2 1/2, 10)
(3, 12)
(5, 8 1/2)