Which statements are true about the function y = x2 + 2x – 3? Choose the THREE statements that are correct.
А
The graph of the function opens up.
B
The graph of the function opens down.
C
The graph of the function has a vertex at (1,0).
D
The graph of the function has a vertex at (-1,-4).
E
The graph of the function has an axis of symmetry of x = 0.
F
The graph of the function has an axis of symmetry of x = -1.