Find the horizontal asymptote, if any, of the graph of the rational function. 21x2 g (X) = 7x2 + 8 . . . . . Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. The horizontal asymptote is (Type an equation.) OB. There is no horizontal asymptoteNex Find the horizontal asymptote, if any, of the graph of the rational function. - 3x + 4 f(x) = 7x + 4 . . .. . Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The horizontal asymptote is (Type an equation. Simplify your answer. Use integers or fractions for any numbers in the equation.) O B. There is no horizontal asymptotea. Find the slant asymptote of the graph of the rational function and b. Use the slant asymptote to graph the rational function. 1 f ( x ) = x2 - 4 a. The equation of the slant asymptote is