in the graph of the functio Y = x^2 -3, which describes the shift in the vertex of the parabola if the -3 is changed to a 6 ? A.it moves up 6 unites B. it moves up 3 unites C. it moves down 6 unitesD. it moves up 9 unites

In the function y = -x² - 3, the vertex is located at (0, -3)
If we change the -3 by a 6, we get: y = -x² + 6. In this function, the vertex is located at (0, 6). And the vertex moves up 9 units