Algebra-1

Question Analysis
This question assesses the student's ability to identify the independent variable in a scientific study. The independent variable is the one that is manipulated or controlled by the researcher.

Key Concept Explanation
In this context, the independent variable (amount of fertilizer used) is the factor that the scientist can control and change to observe its effect on the dependent variable (height of the plant).

Step-by-step Solution
1. Identify the variable that is being manipulated or controlled: The amount of fertilizer used.
2. Determine that this variable is th...