A quadratic function f is given - follow and answer all blanks.

1. [-/0.83 Points] DETAILS SALGTRIG4 3.1.015. MY NOTES ASK YOUR A quadratic function fis given. R(x ) = x2+ 6x+8 (a) Express fin standard form. f( x ) = (b) Find the vertex and x- and y-intercepts of f. (If an answer does not exist, enter DNE.) vertex ( x, y ) = x-Intercepts (x, y) = (smaller x-value) ( x, y ) = (larger x-value) y-Intercept ( x, y ) = (c) Sketch a graph of f