### Home > CCAA8 > Chapter 6 Unit 7 > Lesson CCA: 6.2.5 > Problem6-113

6-113.

Coryn and Leah are working on homework problems that involve arithmetic sequences. Coryn wrote down (2, 4) and (3, 5) from one sequence, and Leah had (3, 2) and (0, 3) for a different sequence. Find an equation for each sequence.

The second term of Coryn's sequence is 4 and the thrid term is 5.

You need to know how much is being added and the 'zeroth term' in order to write the equation.

$a_{n} = t(n) =n + 2$

Leah's sequence is a little more difficult.
Think of the order of her sequence as 3, _____, _____, 2, ...

$a_{n} = -\frac{1}{3}n + 3$