9. For a function f(x), f'(- 3) = 5 indicates f(x) is at x = 3. a) Increasing b) Decreasing c) Concave Down d) Concave Up 10. =x+2x+1. Find the intervals of concavity for f(x) a) Concave up: (2,∞), Concave down: (- ∞, 2) b) Concave up: (- ∞, 2), Concave down:(2,∞) c) Concave down: (- ∞, ∞) d) Concave up: (- ∞, ∞)