Please help me understand these proofs

Let f (m, y) 2 633; for :13 > 0 and y > 0 be a joint pdf of :r: and y. Prove that these two variables are independent random variables. (HINT: Review the denition of independence.) Upload Choose a File Let a and b be any real numbers. Prove that 001; (am, by) = abCov (x, y). Upload Choose a File