Question

I need help with 9, 11, and 12.I would appreciate step-by-step explanations :)

Answer 1

The general equation of the quadratic function is:

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

Where: the vertex will be = (h, k)

Given for problem 9:

$f(x)=2(x-3)^2+1$

compare to the general form

so, h = 3, k =1

So, the coordinates of the vertex = (3, 1)