What is the k value for the vertex of y = x^2 - 6x + 7?

I need help badly can yall help me out pl

this may not be at all, but i use the same website you're using for school, and if i'm stuck doing one of these i try to look for it on the section.

what shape is

first, you divide the triangle in two, tô form a retangle triangle. after, using pythagoream theorem:

18^2 = 14^2 + (x/2)^2

(x^2/4) + 196 = 324

x^2/4 = 324 - 196

x^2/4 = 128

x^2 = 512

x = √512

x = √2^9

x = 16√2 cm

i hope i you.

it would rotate about 180 degrees.