The answer to the question is B
Hope this helps :)
We are given the quadratic:

, with a=1, b=-8, c=15.
We know that the x-coordinate of the vertex, which is the point where the line of symmetry passes through is

.
Thus, the x-coordinate of the vertex is

.
Thus, the line of symmetry is x=4.
Answer: <span>B. The line of symmetry should have been 4 instead of –4. </span>
1. 4
2. 6
3. 2
I had got it wrong on study island and it gave me the right answer
It would be 1000 since the 2 is not bug enough to carry it over.