Respuesta :
Answer:
First question: 2. Hold constant throughout the entire experiment
Second question: 2. One you change or manipulate. Everything depends on what you do to this variable.
Explanation:
Answer:
Independent variable is that which we change or manipulate.
Explanation:
By changing the independent variable, there is a corresponding change in the dependant variable which we intend to measure.
Answer:
The dependant variable is the one you measure. The dependant variable depends on how you change the independent variable.
Explanation: For example we want to observe speed of a car change with respect to time.
Here, time is the independent variable as it has its own pace regardless of the car. However, at different instances of time , the car has different speeds. Thus, the speed of the car is the dependant variable as it depends on time.