Thread: Help with finding Annual Rate of Increase/Decrease

Data table in attachment.

Determine, to the nearest tenth of a percent, the average annual rate of increase/decrease for each school.

I really have no clue what to do here. It's related to Exponents/Logs I'm pretty sure, I didn't do so hot in that unit.. Any help would be awesome.

Hello, fkhnksaha!

It's much simpler than you think . . .

Determine, to the nearest tenth of a percent,
the annual rate of increase/decrease for each school.

. .

Formula: . . . . and convert to a percent.

. . In baby-talk: the second term minus the first, divided by the first.



School #1


Year 1995-1996: 1353 → 1391

. . We have: .

Therefore, the rate of increase is: .



Year 1996-1997: 1391 → 1343

. . We have: .

Therefore, the rate of decrease is: .



Think you can do the rest of them now?

Oh my, I feel stupid right now. I guess groups of questions aren't always related. Thanks for helping me realize the simplicity of it, Soroban.

To find the average do we just take the rate of increase/decrease of each year, add them, then divide by number of terms?

Originally Posted by yaphetkotto

To find the average do we just take the rate of increase/decrease of each year, add them, then divide by number of terms?

That's what I would do.