No, they can be rational or irrational. The sign of a number has nothing to do with it.
If you have any positive irrational number, then its negative is also irrational.
A negative irrational number can be thought of as an irrational number multiplied by -1, or an irrational number with a minus sign in front of it.
If it says "negative irrational", then obviously it is irrational.
The negative of a rational number is also rational.
Not necessarily. Irrational numbers can be negative or positive.
no
No integer is irrational.
No.
Unless the integer is fractional it is not an irrational number.
Negative pi
No
no