the control the hypothesis statement the dependent (responding) variable the independent (manipulated) variable
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: A physicist wants to determine the speed a car must reach to jump over a ramp. The physicist conducts three trials. In trials two and three, the speed of the car is increased by 20 miles per hour. What is the physicist investigating when he changes the speed?
Possibilities:
- the control
- the hypothesis statement
- the dependent (responding) variable
- the independent (manipulated) variable

the independent (manipulated) variable