Sponge Bob notices that his pal Gary is suffering from slimotosis, which occurs when the shell develops a nasty slime and gives off a horrible odor. His friend Patrick tells him that rubbing seaweed on the shell is the perfect cure, while Sandy says that drinking Dr. Kelp will be a better cure. Sponge Bob decides to test this cure by rubbing Gary with seaweed for 1 week and having him drink Dr. Kelp. After a week of treatment, the sime is gone and Gary's shell smells better.

What is the independent variable?
What is the dependent variable?
What is the constant?

(Answer choices)
Dr. kelp and seaweed rub
Amount of slime and smell
1 week