Posted by **Lola** on Tuesday, March 1, 2011 at 7:29pm.

Find the rule for 9,16.8, 24.6, 32.4

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**Ms. Sue**, Tuesday, March 1, 2011 at 7:31pm
16.8 - 9 = 7.8

- math -
**Lola**, Tuesday, March 1, 2011 at 7:32pm
i left out the part that you need to put it in nth term

- math -
**Anonymous**, Tuesday, March 1, 2011 at 11:45pm
a(n)=a(n-1)+7.8

OR

a(n)=a1+(n-1)*d

a(n)=9+(n-1)*7.8

In google type:

arithmetic progression

When you see list of results click on some site.

wikipedia is good choice

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