Algebra-1

Question Analysis
This question involves identifying the independent variable in a real-world relationship between two related variables.

Key Concept Explanation
An independent variable is the variable that is manipulated, changed, or chosen freely, and it is considered to have an effect on another variable.
The dependent variable depends on the independent variable and is the one being observed or measured as a result of changes in the independent variable.

Step-by-step Solution
1. Identify the variable that is being manipulated or control...