Algebra-1

Question Analysis
This question tests the ability to distinguish between independent and dependent variables in an equation. The focus is on understanding which variable is controlled (independent) and which is affected (dependent).

Key Concept Explanation
Independent variable (input): The variable that is chosen or manipulated (e.g., number of items d).
Dependent variable (output): The variable that changes in response (e.g., cost C).

Step-by-step Solution
The equation C = 5d + 10 d...