Explanation:
I cannot draw here.
but the graph of f(x) = |x| is a big "V".
on the negative x side it is a line diagonally from the top left to the origin (0, 0), and on the positive x side it is a line diagonally from the origin (0, 0) to the top right.
now, f(x) = |x| + 3 is then the whole (otherwise unchanged) graph of |x| shifted up by 3 units. and the "V" vertex is then at (0, 3) instead of at (0, 0).