Yes.
It's rational. It's the ratio of -1 to 9 .
Yes, it is.
Yes and it is 1/3
Yes.
41/9 is a rational number because all fractions are rational numbers
Any addition, subtraction, multiplication, or division of rational numbers gives you a rational result. You can consider 8 over 9 as the division of 8 by 9, so the result is rational.
2/9 is rational by definition- it is a ratio of two integers.
Yes. Any rational number divided by another rational number is also rational.
Yes
It is 9, though if you must have it in the form of a ratio, you could try 9/1.
1/4, or .25 is rational.