Answer:
No, 9/31 is not an irrational number.
Step-by-step explanation:
A real number is called rational number when it can be expressed in the form of
,
Where, both p and q are integers and q ≠ 0,
Otherwise, it is called irrational number.
Here, the given number is,

Since,both 9 and 31 are integers,
Also, 31 ≠ 0,
⇒ 9/31 is a rational number,
Hence, It is not an irrational number.