Independent versus Dependent Variable Practice

Amount of time until pain was relieved

In a study about headaches, doctors gave patients Alieve, Tylenol, Advil, and Excedrin, to see which medication would relieve the headache pain the fastest. The doctors timed how long it took the medication to work. What is the DV?

Types of pain reliever

In a study about headaches, doctors gave patients Alieve, Tylenol, Advil, and Excedrin, to see which medication would relieve the headache pain the fastest. The doctors timed how long it took the medication to work. What is the IV?

Type of fertilizer

A farmer applies different fertilizer to his cotton crops, to see which will make his plants grow the highest. What is the IV(Independent Variable)?

Height of plants

A farmer applies different fertilizer to his cotton crops, to see which will make his plants grow the highest. What is the dependent variable?

Amount of weeds killed

I use different types of weed killers on my lawn to see which one kills the most weeds. What is the DV(Dependent Variable)?

Type of weed killer

I use different types of weed killers on my lawn to see which one kills the most weeds. What is the IV?

Amount of damage to the dummy

To test the safety of a car, crash tests will test different types of cars in collision situations. They want to determine in which car the crash test dummy receives the least amount of damage. What is the DV?

Type of car

To test the safety of a car, crash tests will test different types of cars in collision situations. They want to determine in which car the crash test dummy receives the least amount of damage. What is the IV?