There were 7 books ina series of mystery novels. Each book was written and published every two years. The fifth book in this series was written and published in 2003. In which years were the remaining books written and published?
book# year
1
2
3
4 2001
5 2003
6 2005
7
now fill in the rest
or, you have a point (5,2003) and a slope (2) so the equation of the line is
year = 2003 + 2(book#-5)
or
year = 1993 + 2*book#