Which relationship shows an inverse variation?x: 2,3,4,5f(x):1,4,9,16x:1,2,3,4f(x):2,8,18,32x:1,2,3,4f(x):4,3,2,1X:2,4,6,8f(x):12,6,4,3,

Only in the 4th selection do you have x*f(x) = constant (= 24). That selection shows an inverse variation.