Yes, -13 is a rational number. A rational number is any number that can be expressed as a fraction where the numerator and denominator are both integers (whole numbers) and the denominator is not zero.
In the case of -13, it can be expressed as the fraction
−
13
1
−
1
13
, where the numerator is -13 and the denominator is 1. Since both the numerator and denominator are integers and the denominator is not zero, -13 meets the criteria for being a rational number.