When two variables have a negative correlation,a. when the x-variable decreases, the y-variable decreases.b. when the x-variable decreases, the y-variable increases.c. when the x-variable increases, the y-variable increases.d. more than one of the above is correct?

The correct answer is letter B, when x-variable decreases, the y-variable increases.

Because a negative correlation is a relationship, where one variable increases and the other one decreases.