42. In the equation ax + b = 0, when a, x, and b are integers and x and b are positive, a must be:

Answer and Explanation

Your Answer is

Correct Answer is F

Explanation

From the question stem, we can know that b is greater than 0, so ax must be a negative number; since x is greater than 0, a must be less than 0; because ax=-b, a and x are integers, so both are factors of b.