Check whether x and y vary inversely or not

x	y
30	60
120	30
60	30
24	75

$∵ x$1y1 = 30 \times 60 = 1,800,\\[1em] x2y2 = 120 \times 30 = 3,600,\\[1em] x3y3 = 60 \times 30 = 1,800,\\[1em] x4y4 = 24 \times 75 = 1,800,\\[1em]

So, $x$1y1 ≠ x2y2 ≠ x3y3 = x4y4

Hence, x and y do not vary inversely.