Question

The graph of which quadratic equation has a vertex of (2, 1)?

y = (x – 1)2 + 2

y = (x – 2)2 + 1

y = (x + 2)2 + 1

y = (x + 1)2 + 2

Answer 1

the vertex form of the equation is

\[y = (x - h)^2 + k\]

has a vertex at (h, k)

so you need an equation when h = 2 and k = 1

Answer 2

so it would be the third one? @campbell_st

Answer 3

nope... the 3rd one has h = -2 remember is (x - h)

( x - -2) = x + 2