Question

PLEASE HELP!!!

Answer 1

B or c for the equation because it is 1-n

Answer 2

$\bf \sum\limits_{n=1}^{6}~(1-n) \\\\\\ \stackrel{\stackrel{n=1}{1-1}}{0}~~+~~\stackrel{\stackrel{n=2}{1-2}}{-1}~~+~~\stackrel{\stackrel{n=3}{1-3}}{-2}~~+~~\stackrel{\stackrel{n=4}{1-4}}{-3}~~+~~\stackrel{\stackrel{n=5}{1-5}}{-4}~~+~~\stackrel{\stackrel{n=6}{1-6}}{-5}$