Yes, -3 is both a rational number and an integer.
yes it is both rational and an integer
-16 is both a negative integer and a rational number
Every integer is.
Yes and yes. It is an integer and so it is also a rational number.
It is both.
By definition, an irrational number is a number that is not rational, or in other words a number that cannot be expressed as an integer divided by another integer. A number cannot be both "rational" and "not rational."
It is a rational number, not an integer.
Every integer is a rational number.
A rational number which is an integer can be simplified to a form in which the denominator is 1. That is not possible for a rational number which is not an integer.