Hey! The formula of direct variation is y = kx. So we know that p = kr^2 Hint: after it says varies, it's basically the equal sign. so we can set it up 56 = 4^2k 56=16k now we want k alone so we have to divide 16 on both sides k=3.5 We can now solve for p like it asks p = 3.5*6^2 p=126 There's your answer! Hope this helps!