These problems test your understanding of functions, in particular, composition of functions.

14) Look at f(g(-3)) from the inside out. That is, find g(-3) first. So, say you find that g(-3) = a, then you look up f(a).

15) This is the same setup, but instead of reading off the graph you have a table. Also the notation is slightly different but it's the same meaning, in this case, find f(g(4)).