Answer:
-9 is a rational number and an integer.
Step-by-step explanation:
A rational number is any number that can be expressed as a fraction. -9 can be written as [tex]-\frac{9}{1}[/tex], thus it is a rational number.
A whole number is a number that is not negative and does not have fractions or decimals. -9 is negative, thus it is not a whole number.
An integer is a number with no fractions or decimals, but it can be negative or positive. -9 meets these requirements, thus it is an integer.
An irrational number is a number that cannot be written as a fraction. Irrational numbers are not rational. Thus, -9 is not an irrational number.
So, -9 is a rational number and an integer.
