Use the reseаrch scenаriо belоw tо аnswer the remaining questions: Researchers developed a drug that should stimulate the feeding center in animals to cause them to put on more weight quickly. It's called TR6-1, and 50 pigs were given the drug. Another 50 received a placebo. After a year the treatment group was much heavier but resorted to cannibalism a lot more, which actually reduced yields. What is the dependent variable?