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Topic: Please HELP! Transformations
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Al Coons

Posts: 898
Registered: 12/4/04
Please HELP! Transformations
Posted: Oct 20, 1996 6:22 PM
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The AP Syllabus includes:

(I.D.5) Transformations to achieve linearity: logarithmic
and power transformations.

I assume that means tranforming data which fits functions such as:

y = alog x and y = a b^x.

Where I am having problems is with my students' collections of real data. If
a student collects a set of data for which an approximate model might be:

y = 3log(x - 40) + 30 or even y = 3(x-40)^2 + 30

Am I right that there is no easy transformation which will "straighten" these
"curves"??? If so what should we do with the data when trying to model it?


Albert Coons
Mathematics Department
Buckingham Browne & Nichols School
Gerry's Landing Road
Cambridge, MA 02138
(617) 547-6100

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