The translation is (x,y)->(x+2,y+2). To draw the ABC under the translation we have to translate the points A(-2,2), B(-5,-2) and C(-6,4).
The translation correspond to add 2 units to the x-value and 2 units to the y-value. So the triangle ABC transform to A'B'C', the points A', B' and C' are:
