Since you are being asked to graph answers which are based on graphical inputs, yes, you'll need to graph. From the posted example, I would suspect that the text explains the topic fairly succinctly; follow the process illustrated in the example by drawing the first vector at the displayed "angle" (or "slope", if you like) at the specified length (the first example shows v
as being X1 in length; the second example shows v
as being X2 in length) and direction (the first example shows w
going "backwards", since it is negative). From the end of the first vector, draw the second vector. Then draw the third vector starting from the base of the first vector to the tip of the second.