The number of milligrams of a certain medicine a veterinarian gives to a dog varies directly with the weight of the dog. If the veterinarian gives a 30-pound dog milligram of the medicine, which equation relates the weight, w, and the dosage, d?
If you would like to know which equation relates the weight and the dosage, you can find this using the following steps:
30-pound dog ... 1 milligram of the medicine
w pound dog ... d milligram of the medicine
30 d = 1 w
30 d = w
The correct result would be 30 d = w.