Which statement best describes how to determine whether fx=9-4x2 is an odd function? Determine whether 9-4-x2 is equivalent to 9-4x2 Determine whether 9-4-x2 is equivalent to 9+4x2 Determine whether 9-4-x2 is equivalent to -9-4x2 Determine whether 9-4-x2 is equivalent to -9+4x2