y = ( x − 1 ) 2 + 1 F or t h e q u a d r a t i c f u n c t i o n f ( x ) = a ( x − h ) 2 + k w h ere a , h an d k a re re a l n u mb ers w i t h a = 0 , t h e v er t e x i s ( h , k ) = ( 1 , 1 ) a sy mm e t ry ab o u t t h e v er t i c a l l in e x = h x = 1
The domain of the function y = ( x − 1 ) 2 + 1 is all real numbers. The range is from 1 to infinity, the vertex is (1, 1), and the axis of symmetry is x = 1 .
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