What is a equation for the slope -3/4 and passes through (-8,3)

100 points, hi, i’m not sure how to get the equation from the graph and table.

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)

1yd 1 ft = 1 1/12 1 1/3 1 1/2 1 1/6