Which transformation shifts the graph of f(x)=x2f(x) = x^2f(x)=x2 up by 3 units?
f(x)=(x+3)2f(x) = (x + 3)^2f(x)=(x+3)2
f(x)=x2+3f(x) = x^2 + 3f(x)=x2+3
f(x)=x2−3f(x) = x^2 - 3f(x)=x2−3
f(x)=3x2f(x) = 3x^2f(x)=3x2