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Kevin Driscoll
(Los Angeles - United States)I taught Computer Science and Mathematics from 2004-2007 at Prospect Hill Academy Charter School in Cambridge, MA. Since then, I completed a Master's degree in Comparative Media Studies at MIT and am now a PhD candidate in Communication at University of ...
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- From: San Diego Area Knowledge Exchange for Developmental Math (SAKE)
- Contributed By: SAKE Owner SAKE Owner
The lesson begins with a comparison of data tables and graphs of two functions, one directly proportional (cost of gas) and the other exponential (population), before a definition for direct variation is introduced. Direct variation is then linked to linear function (f(x)= kx)and the scaling property of direct variation is examined (i.e. a multiple of the independent variable will always correspond to that same multiple of the dependent variable). Direct variation with a power of x follows with a test for direct variation before indirect variation and indirect variation with a power of x are introduced.
