Use the graph of the polynomial function f(x) = −x3 + 5x2 − 2x – 8 to complete the following:
f is on the intervals (- ∞,1/3) and (3, ∞).
f is on the intervals (- 1, 2) and (4, ∞).
f is on the interval (1/3, 3).
f is decreasing on the intervals (−∞, - 1) and (2, 4).
Word Bank: Positive Decreasing Increasing Negative