x (1-4x3) 6. Let f(x) = Which of the following is a horizontal asymptote for this x* (2x + 1 ) function? A. This function does not have a horizontal asymptote B. y=-2 C. y=0 D. y =4 E. y= -4 F. None of the above 7. Which of the following functions has a horizontal asymptote y = 2 ? A) f (x) =- 2x -1 x2 - 9 B) f(x) = x-2 x-1 8x- -1 C) f(x) = (2x - 1) D) f(x) = 2x- -1 x+2 E) f (x) = 6.x-2 2x' +4 F) None of these