The verbal rule Miriam could use to determine the ounces of dog food per day to feed each dog is to feed the dog one ounce of Barko dog food per pound of body weight.
To create a verbal rule for feeding the dogs, we need to determine the relationship between the weight of the dog and the amount of Barko dog food required.
With the partial information provided, we know:
A 3-pound dog requires 3 ounces of Barko.
A 12-pound dog requires 12 ounces of Barko.
A 20-pound dog requires 20 ounces of Barko.
This suggests that the amount of Barko needed is equal to the weight of the dog in pounds.
Therefore, a simple verbal rule Miriam could use is: Feed each dog one ounce of Barko dog food per pound of body weight.