The following table tells us about the sales (in millions of dollars) of a computer chip manufacturer in the following years.

Years	1990	1991	1992	1993	1994	1995	1996	1997
Sales (millions of dollars)	325	4624	7714	11518	15598	15607	19989	22285

Find the average rate of change from 1991 to 1995. $___________millions of dollars per year.

Then if that rate of change continues, when will the sales exceed 40000 million dollars? _________ years.

Hint:

In the first part, you computed the average rate of increase per year.The table tells you how much sales were in 1997, so if sales continue to increase per year by the amount you computed in the first part, how many years will it take to increase sales from the amount in 1997 to 40000 million?

***** The answer of the second part is not 6.45 years.