How is the graph of y = 3x2 + 3 different from the graph of y = 3x2?

a
It is shifted 3 unit(s) right.
b
It is shifted 3 unit(s) up.
c
It is shifted 3 unit(s) left.
d
It is shifted 3 unit(s) down.

The correct answer is b) It is shifted 3 unit(s) up.