8. 12 16 f (x ) 18 25 8 7.99 31 7.8 7.75 7.7 A 10 11. 101 201 301 401 501 "(xx) 10 11 12 13 14 12 Use the graph of f to answer the question below. 12. 13. f(xt - f ( 0 ) = d - ON a. On what interval(s) is the graph concave up? a. On what interval(s) is the graph concave up? b. On what interval(s) is the graph concave down? b. On what interval(s) is the graph concave down? c. On what interval(s) is the graph increasing? c. On what interval(s) is the graph increasing? d. On what interval(s) is the graph decreasing? d. On what interval(s) is the graph decreasing? e. Find the zeros of the function. e. Find the zeros of the function. f. Find the y-intercept of the function. f. Find the y-intercept of the function