What is the domain of the function represented by the graph?

Given the box plot, will the mean or the median provide a better description of the center? box plot with min at 10.5, q1 at 11.5, median at 12.5, q3 at 13.5, max at 15

Which term best describes the association between variables a and b

Ined this is due tomorrow and i dont know the answer can you find all the exponents