The graph of the equation y = x2 - 3 is shown. Which equation will shift the graph up 6 units?A) y = x2 + 3 B) y = x2 - 6 C) y = x2 + 6 D) y = (x + 6)2

A should be the right answer. 
The picture show the graph that shift down 3 units
The equation that I chose shift up 3 units from 0, in which it compares to the picture from -3 up to 3 will be 6 units