Question

Which of the following is true about -9?
A. It is an integer but not a rational number
B. It is a whole number but not an integer
C. It is an integer but not a whole number
D. It is both an integer and whole number

Answer 1

The correct answer is:

C. It is an integer but not a whole number.

Explanation:
- An integer is any whole number (positive, negative, or zero), and -9 is an integer.
- A whole number is a non-negative integer, meaning it includes 0 and positive numbers (0, 1, 2, 3, ...). Since -9 is negative, it is not considered a whole number.