Atriangle with vertices at a (-1,1), b(-2,1) c(-1,4) is translated. the image of vertex a has coordinate at (3,-1) determine the coordinate of either the image of vertex b or the image of vertex c

For this case we have the following vertices:
 A (-1,1) > A '(3, -1)
 B (-2.1)
 C (-1,4)
 We note that the translation rule is:
 (x, y) > (x + 4, y-2)
 Applying the translacion rule we have:
 B (-2, 1) > (-2 + 4, 1-2) > B '(2, -1)
 C (-1, 4) > (-1 + 4, 4-2) > C '(3, 2)
 
 The image of vertex B or the image of Vertex C are:
 B '(2, -1)
 C '(3, 2)