The degree of a polynomial function f is 7. The function has roots of multiplicity 3 at x = -4 and x = 3 and a root of multiplicity 1 at x = -3. The graph has y-intercept (0, -81). What is the equation of the function? Of ( x ) = (x+ 4)' (x+ 3) 3 ( x + 3 ) Of ( x ) = - 7(x+4)'(x- 3)3 (x+ 3) Of ( x) = (x+4)'(x - 3)3 (x+3) Of ( x ) = = (x+4)3(x -3)3 (x+ 3) Of ( x ) = = (x - 4)'(x+ 3)3 (x - 3) Of ( x ) = (x+ 4)3(x - 3)3