A' will be the new value of A
ok, so the original points are
A=(-4,4)
B=(0,4)
C=(1,2)
D=(-3,2)
(x,y)
x is how far to right and y is how far up
movement left is minus x
movement down is minus y
so 4 right and 1 down
add 4 to every x and minus 1 from every y
A=(-4,4) becomes (0,3)
B=(0,4) becomes (4,3)
C=(1,2) becomes (5,1)
D=(-3,2) becomes (1,1)
A'=(0,3)
B'=(4,3)
C'=(5,1)
D'=(1,1)
