Final answer:
Store B sells corn at a lower rate compared to Store A.
Step-by-step explanation:
To determine which store sells corn at a lower rate, we need to compare the cost of corn per pound at each store. Store A sells 2 pounds of corn for $4, which means that the cost of 1 pound of corn is $4/2 = $2. Store B sells 3 pounds of corn for $5.61, which means that the cost of 1 pound of corn is $5.61/3 = $1.87. Therefore, Store B sells corn at a lower rate compared to Store A.