C Let the function f be increasing or decreasing, but not both. State whether the function is increasing or decreasing on the given interval and justify your answer. 6. 7. f(x) X 1 2 3 4 5 f(x) 95 90 75 50 10 2 9 X b 8. 12 16 18 25 31 f(x) 8 7.99 7.8 7.75 7.7 foo 10. 11. f(x) x 101 f(x) 10 201 11 301 12 401 501 13 14 Use the graph off to answer the question below. 12. f(0) = e f(x) a b C d 1 W 5 12 13. f(x) f(0) = d a b C a. On what interval(s) is the graph concave up? b. On what interval(s) is the graph concave down? c. On what interval(s) is the graph increasing? d. On what interval(s) is the graph decreasing? e. Find the zeros of the function. f. Find the y-intercept of the function. a. On what interval(s) is the graph concave up? b. On what interval(s) is the graph concave down? c. On what interval(s) is the graph increasing? d. On what interval(s) is the graph decreasing? e. Find the zeros of the function. f. Find the y-intercept of the function.