Balanced forces will cause an object to move at a constant speed or to remain at rest. Which of the following graphs shows this situation? W. X. Y. Z. A. Z B. W C. Y D. X answer quickly

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?