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Please HELP! Transformations
Posted:
Oct 20, 1996 6:22 PM


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(x40)^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?
Al
Albert Coons Mathematics Department Buckingham Browne & Nichols School Gerry's Landing Road Cambridge, MA 02138 (617) 5476100 AlCoons@aol.com



