Question

which of following is true about -9?
- it is a whole number but not an integer
- it is an integer but not a rational number
- it is both an integer and a whole number

Answer 1

The correct statement is: **"it is an integer but not a whole number."**

- Whole numbers are defined as non-negative integers (0, 1, 2, 3, ...), so -9 is not a whole number.
- However, -9 is indeed an integer, as integers include all whole numbers and their negative counterparts (..., -3, -2, -1, 0, 1, 2, 3, ...).
- Additionally, -9 is also a rational number because it can be expressed as a fraction (-9/1).

So if choosing from the options you provided, none of them accurately describe -9 entirely correctly.