A function y f x has a second order derivative f sup2 x 6 x 1 If the graph passes through the point ...........

A function y = f(x) has a second order derivative f²(x) = 6 (x-1). If the graph passes through the point (2,1) and this point tangent to the graph is y=3x-1, then the function is:

(x-1)³

(x-1)²