Hi, I'm really having trouble with this homework especially part b and c. For part b I equaled both parts of the equation to zero and got the horizontal asymptote y = 1 and vertical asymptote y = -2. Can you help me?

(c) Give the intervals of increase and decrease of f (x). Note: Use the letter U for union. To enter oo, type infinity. If the function is never increasing or decreasing, enter NA in the associated response area. increasing: (-2, infinity) decreasing: (-infinity, -2)Consider the function f (x) = x-1 (a) Find the domain of f (a). Note: Use the letter U for union. To enter oo, type infinity. Domain: (-infinity, -2) U (-2, infinity) (b) Give the horizontal and vertical asymptotes of f (x), if any. Enter the equations for the asymptotes. If there is no horizontal or vertical asymptote, enter NA in the associated response area. horizontal 1 asymptote: vertical -2 asymptote: (c) Give the intervals of increase and decrease of f (x)