Each rate of change is constant. Find the rate of change and explain what it represents.
1.
2.
Miles Per Hour
Fences Painted
Hours Fences
Hours
3
2
1
2
4
Miles
70
140
210
280
3
6
12
4
8

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)