Answer: A.
Explanation:
It can't be C or D because if you plug the y and x in, it will make the equation become not true!
Let's test the point (2,4)
y= x^2 + 2
4 = 6
This is not true, so C and D are wrong!
It can't be B because this graph is a linear function; you can test it using the line test.
So answer is A