What is the line of symmetry of the quadratic function f(x)=(x-5)^2+11

Question

What is the line of symmetry of the quadratic function f(x)=(x-5)^2+11

Answer 1

When a quadratic is written in vertex form:

 

f(x) = a(x-h)^2 + k

 

Then x = h is axis of symmetry.

 

Another example:

 

g(x) = 2(x+6)^2 + 13

 

axis of symmetry is x = -6

Answer 2

For f(x) = (x - 5)² + 11 the axis of symmetry is x = 5.