Please help due soon :)

For which pair of functions is (gof)(a)=|a|-2?

The given dot plot represents the average daily temperatures, in degrees fahrenheit, recorded in a town during the first 15 days of september. if the dot plot is converted to a box plot, the first quartile would be drawn at __ , and the third quartile would be drawn at __ link to graph: .

Which representation has a constant of variation of -2.5