Determine whether the following relation is a function. {(3, 7), (3, 8), (3, 4), (3, 1)} A. It is a function because the ordered pairs all have the same x-value.

B. It is not a function because there are multiple y-values paired with a single x-value.

C. It is a function because none of the ordered pairs have the same y-value.

D. It is not a function because none of the ordered pairs have the same y-value.

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?