The integer is still 9. It is a signed integer; the sign is minus.
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No. It is rational, AND it is an integer. Integers are the numbers - positive, negative, or zero - which have no decimals.
22
The integers are 7, 8 and 9.
There are 10 one digit positive integers (0 - 9) and 9 one digit negative integers (-9 to -1) making 19 in all.
Yes. The quotient of two non-zero integers is a rational number.