Find the mean absolute deviation of the set of data. 8, 7, 4, 6, 6

What situation is an example of an observational study

Sketch one cycle if the cosine function y=2cos2theta

Graph the line that represents a proportional relationship between d and t with the property that an increase of 33 units in t corresponds to an increase of 44 units in d. what is the unit rate of change of dd with respect to t? (that is, a change of 11 unit in t will correspond to a change of how many units in d? )