The graph of the function f(x)=x^2-4x+6 is shown here. What is the axis of the symmetry?

A. X=0
B. X=2
C. X=6
D. X= -2

Write the component forms of vectors u and v, shown in the graph, and find v − 2u. u= (< -3, -2> , < -3, -1> , < -2, -2> , < -2, -1> ) v= (< -5, 1> , -4, 0> , < 0, -4> , < 1, -5> ) v-2u= (< 5, 3> , < 0, 4> , < 4, 0> , < 5, -3>