Yes, negative 4 is a rational number.
A rational number is defined as any number that can be expressed as the quotient of two integers, where the denominator is not zero. In the case of negative 4, it can be written as -4/1. Here, both -4 and 1 are integers, and since 1 is not zero, this meets the criteria for rational numbers.
Therefore, since negative 4 can be represented as a fraction of integers, it is indeed classified as a rational number.