Question 992060
You already know that the number may be 9  or negative 9.  What kind of number is or are these?


9 and  -9 are:
Numbers we count with;
are not attached to fragments of numbers we count with;
are numbers we use for counting and are on either side of 0 on the number line;
can be written or expressed as one integer divided by another integer leaving no remainder;
and certainly NO approximation needed when finding sqrt(81) and we use simply a basic number fact.


NOW, can you answer your question?