Marcie is trying a new cookie recipe. she wants to see if the amount of baking powder she uses
will make the cookies rise more. she makes three batches of cookies and changes the amount of
baking powder for each batch.
6. what is the independent variable?

The amount of baking powder for each batch

Explanation:

When doing an experiment, we have at least 2 variables involved:

- The independent variable, which is the variable whose value is changed by the operator, to test how the dependent variable will change

- The dependent variable, which is the variable whose value changes depending on the changing in the independent variable, and it is not directly controlled by the operator

For this experiment, we have:

- The amount of baking powder for each batch is the independent variable, since it is changed by Marcie

- The size of the cookies is the dependent variable, since Marcie wants to see how this quantity changes when the independent variable (the amount of baking powder) is changed