Question

In the function f (x)=(x-2)^2+4, the minimum value occurs when x is... (a) -2

(b) 2
(c) -4
(d) 4

Answer 1

Hello,

y=a(x-h)²+k has the vertex (h,k)
If a>0 it is a minimum
if a<0 it is a maximum

Here h=2 and k=4

The minimum is 2
Answer B.