No.
A negative sign, by itself cannot affect whether or not a number is rational.
No.
The sign of a number has no bearing on whether or not it is rational.
It would have no effect.
Only if the negative sign is associated with an even root. In that case, the number is neither rational nor irrational, but is imaginary.
A negative sign, by itself cannot affect whether or not a number is rational.
Any integer, whether it is positive or negative, is a rational number.
No.
Any positive number is always bigger than a negative number - whether they are rational or irrational.
The sign of a number has no bearing on whether or not it is rational.
Yes, any number with a defined end-point, whether it be positive or negative, is a rational number.
It would have no effect.
Only if the negative sign is associated with an even root. In that case, the number is neither rational nor irrational, but is imaginary.
Any integer, whether positive or negative, is a rational number. It can be expressed as a fraction with a negative numerator and a denominator of 1.
12 is the ratio of 12 and 1 ... nice and rational.
It is a negative number. It is also a rational number; also, it's a real number.
You can classify them according to whether they are positive, zero or negative; whether they are integers or not, whether they are unit fractions or not and so on.