What is the answer to this 19 3/4 / 2

Use the function f(x) is graphed below. the graph of the function to find, f(6). -2 -1 1 2

Drag each tile to the correct box. not all tiles will be used. consider the recursively defined function below. create the first five terms of the sequence defined by the given function

Iknow the answer but the calculator doesn't seem to give the right one