Algebra-1

Question Analysis
This question tests the application of the floor function to a negative number, reinforcing the understanding of the greatest integer less than or equal to a given number.

Key Concept Explanation
The floor function, denoted as , returns the greatest integer less than or equal to . For a negative number like -15.7, the greatest integer less than or equal to -15.7 is -16.

Step-by-step Solution
1. Identify the given number: -15.7
2. Determine the greatest integer less than or equal to -15.7: -16
3. Therefore,