Which of the following is true about −9?(1 point)
Responses
It is a whole number but not an integer.
It is both an integer and a whole number.
It is an integer but not a whole number.
It is an integer but not a rational number.
It is both an integer and a whole number.
The correct answer is: It is both an integer and a whole number.
Explanation:
An integer is a number without a fractional or decimal part. It includes all positive and negative whole numbers, as well as zero. Therefore, -9 is an integer because it is a negative whole number.
A whole number is a non-negative number without a fractional or decimal part. It includes all positive whole numbers and zero. Since -9 is a negative whole number, it is also a whole number.
Therefore, -9 is both an integer and a whole number.