Application Of Derivatives

Step 1: Understanding the Concept:
The derivative represents the slope of the function. The sign of the slope tells us the behavior of the function (increasing or decreasing).
Step 2: Detailed Explanation:

• If , the slope is "upward," meaning the function is increasing.
• If , the slope is "downward," meaning the function is decreasing.
• If , the function is at a stationary point (like a peak or valley).

Step 3: Final Answer:
The correct option is (c).