- Graph the function f (x) = x - 4. Use the line tool and select two points to graph. Line * Move Undo Redo x Reset 10 9 8 7 6 5 4 3 N 1 1 2. 3 4 6 7 8 9 10 10 9 8 7 6 5 4 3 2 -19 -2