You can put this solution on YOUR website! translating up 6 units affects the value of y and leaves the value of x the same.
your selection should be number 4 which is x^2 + 9 from x^2 + 3
the graph of both equations is shown below:
you can see that:
when x = 3, bottom graph is at y = 12 and top graph is at y = 18.