Question

Which of the following is the equation of the axis of symmetry of the quadratic equation y = 2(x – 4)2 + 7?
Answer
a.x = –7
b.x = 4
c.x = –4
d.x = 7

Answer 1

The vertex is (4, 7) so the axis of symmetry is x = 4.
The quadratic is in vertex form:
y = a(x - h)^2 + k
where (h, k) is the vertex

Answer 2

Thank you very much!