Can someone help me on this

With #! i’ve tried to figure it out but i can’t.

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.

Which value of m will create a system of parallel lines with no solution? y= mx - 6 8x - 4y = 12