Question in picture help and explain pls

Last one and the bottom answer choice is y=(x-4)^2+1 you guys!

Type the correct answer in the box. consider the system of linear equations below. rewrite one of the two equations above in the form ax + by = c, where a, b, and c are constants, so that the sum of the new equation and the unchanged equation from the original system results in an equation in one variable.

Which polygon is she in the process of constructing ?