Which situations can represent the expression B- X check all that apply

Find the vertex of the function given below y=x^2-6x+1

Solve by any method (graphing, substitution or linear combination)y = x - 82x + 3y = 1a) (2, -6)b) (5, -3)c) (4, -4)d) (0, -8)i figured it out. the answer is (5, -3)

Issof claims that the scale factor is 1/2. which statement about his claim is correct