This table represents a quadratic function. Х
y
1
3
3
-3
5
-5
7
-3
9
3
Which statement about this function is true?
O A
The value of a is negative, so the vertex is a minimum.
OB
The value of a is positive, so the vertex is a maximum.
c.
The value of a is negative, so the vertex is a maximum.
OD
The value of a is positive, so the vertex is a minimum.