Each time a touchdown is scored at a football game 6 points are added to the score of the scoring team. a team already has 12 points what rule represents the number of points as an arithmetic sequence when n is the number of touchdowns scored a. a(n)=12+6n b. a(n)12-(n-1)6 c. a(n)=12+(n-1) d. a(n)=12+(n-6)