We want to find which one is the dependent variable in a relationship between the height of a falling leaf and the time.
The dependent quantity or dependent variable is the height of the leaf.
To see why, we need to briefly explain what dependent and independent variables are.
In a given relationship, the independent variable is the one that can change, it usually is the "input" and is represented with the variable x.
While the dependent variable is a variable that changes in response to the dependent variable.
Now let's go to the example of the falling leaf.
The only thing you can decide in this "experiment", is when you look at the leaf and measure its height.
So the variable that you can control is time, then the time is the independent variable, thus, the dependent variable (or dependent quantity) is the height of the leaf.
If you want to learn more, you can read:
https://brainly.com/question/17498238
