Can u guys help me finish it’s my last question pla

Determine the relationship of ab and cd given the following points

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.

If y varies directly as x2 and y=6 when x=6, find the constant of variation.