Graph the equation on the coordinate plane y = -2x (the picture might be blurry but it's just a graph with the four sections it is blank)

How do i do this activity, is appreciated

27 is what percent of 108? 27 is % of 108

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 0 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)