Answer:
40% is the answer to your question.
I think the answer will be A
Your answer is either A or D
Stem/leaf
4/2
5/
6/7
7/3,8
8/2,4,6
9/1,4
State the vertex and axis of symmetry of the graph of y=ax^2+c
General form of quadratic equation is 
There is no bx in our given equation, so we put 0x
Given equation can be written as 
a=a , b=0
Now we use formula to find vertex


Now we plug in 0 for 'a' and find out y

So our vertex is (0,c)
The axis of symmetry at x coordinate of vertex
So x=0 is our axis of symmetry