Which statement best describes how to determine whether (W) X 5x1 is an even function? Determine whether -(x + 5x + 1) is equivalent to x + 6x + 1 Determine whether (-x)+5(-x)+ 1 is equivalent to x + 5x + 1. Determine whether -x + 5x + 1 is equivalent to -(x + 5x + 1), Determine whether (-x) + 6(-x) + 1 is equivalent to -(x + 3x + 1).