Independent vs Dependent Variables

Steve wanted to see if the type of fertilizer made sunflowers grow larger. What is the independent variable 

• Type of fertilizer
• Size of sunflower
• type of sun flower

Steve wanted to see if the type of fertilizer made sunflowers grow larger. What is the dependent variable 

• Type of fertilizer
• Size of sunflower
• Type of sunflower

Molly investigated if the age of students caused them to be better drivers. What is the independent variable?

• Type of car
• Skill of driving
• Age of student

Molly investigated if the age of students caused them to be better drivers. What is the dependent variable?

• Type of car
• Skill of driving
• Age of student

Sam wanted to know if the color of the chair you sat in when taking a test affected your test grade. What is the independent variable.

• Color or chair
• Grade on test
• Age of students

Sam wanted to know if the color of the chair you sat in when taking a test affected your test grade. What is the dependent variable.

• Color or chair
• Grade on test
• Age of students

Robert wanted to know if the type of phone you used gave you better or worse service. What is the independent variable. 

• Location of phone call
• Type of phone
• How good the service was

Robert wanted to know if the type of phone you used gave you better or worse service. What is the dependent variable. 

• Location of phone call
• Type of phone
• How good or bad the service was

Sarah wanted to find out if the size of a car tire made it a smoother ride over bumps. She drove her car over the same bumpy road three times, with a different sized tire set each time, and observed how much water splashed out of a cup in her cupholder. What is the dependent variable?

• Size of tire

• The amount of water that splashed out of the cup

• Type of car

Steve wanted to see if the type of fertilizer made sunflowers grow larger. He applied three different kinds of fertilizer on three sunflowers, and observed the size of the sunflower after 2 weeks. The type of fertilizer is the...

• independent variable

• dependent variable