HELP ASAP DUE SOON! GIVING BRAINLIESTT!

How do you answer this question? (step by step)

Segment xy is dilated through point m with a scale factor of 2. which segment shows the correct result of the dilation

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)