Points: 0 of 1 If" (x )1 The formula k(X) = [1 + (f'()) 273/2 expresses the curvature k(x) of a twice-differentiable plane curve y= f(x) as a function of x. Find the curvature function of the following curve. Then graph f(x) together with x(x) over the given interval. f( x ) = - 4x, - 25x52 The curvature function is k(x) =