(7,2)
Look at only the x value:
in the beginning, x=4,
But in the transformed equation x is added 3.
4 + 3 = 7
So 7 is your new x-value.
Look at only the y value:
In the beginning, y=1,
But in the transformed equation y is added 1.
1 + 1 = 2
So 2 is your new x-value.
So therefore your new coordinate (image) of B, is:
(7, 2)