Explanations
Given the following coordinate points
A = (4 , -4)
B = (-3 , 2)
The sum of the coordinate point is exprssed as:

Take the sum of the coordinates to have:

Represent the coordinates A, B and its sum A+B on a graph as shown
To draw the required graph, you will connect the coordinate of the vector draw the first vector on a graph and then placing the tail of each subsequent vector at the head of the previous vector