Algebra-2

Question Analysis
This question tests the understanding of direct variation in a real-world context. The student needs to identify the constant of variation and use it to find the cost for a different number of days.

Key Concept Explanation
Direct variation is a relationship where one variable is a constant multiple of the other. The formula is , where is the constant of variation.

Step-by-step Solution
1. Identify the given values: days, dollars.
2. Use the formula for direct variation to find the constant of variation :