Three students are analyzing bean seedlings grown for a science experiment The scatterplot shows the heights of the seedlings and the number of leaves on each plant.

Each student draws a different tread line for the data.

-Kathy draws a line through points A and E.

-Calvin draws a line through points B and D.

-Deanna draws a line through points C and F.

Explain whether or not each student’s trend line represents the data.

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)