For the function y = x2 - 6x + 8, perform the following tasks

 For the function y = x2 - 6x + 8, perform the following tasks:
a) Put the function in the form y = a(x - h)2 + k.
b) What is the equation for the line of symmetry for the graph of this function?
c) Graph the function using the equation in part a. Explain why it is not necessary to plot points to graph when using y = a (x - h) 2 + k.
 d) In your own words, describe how this graph compares to the graph of y = x2?