Final answer:
The number -13/12 is a rational number as it can be expressed as the quotient of two integers, with the denominator being a nonzero number.
Step-by-step explanation:
The number -13/12 is considered a rational number because it can be expressed as the quotient of two integers, where the denominator is not zero. In this case, -13 is the numerator, and 12 is the nonzero denominator.
A rational number is a number that can be expressed as a fraction where both the numerator and the denominator are whole numbers. Since both -13 and 12 are integers, and 12 is not zero, -13/12 fits the definition of a rational number. Therefore, the correct answer to whether -13/12 is rational or irrational is A. Rational.