I have the following data:

Feb-08 Mar-08 Abr-08 May-08 Jun-08 Jul-08
5000 3802 10400 7600 7400 9800

Whith the following trendline obtained from the chart:

y = 30,217x - 1E+06

How Do I estimate Ago-08
to replace the value of X should be x=9?
What happens for next Feb-09, should x= 14?

Thanks!

JP