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Direct linkFarnsworth, David L. – Mathematics and Computer Education, 2005
The normal equations discussed in this paper for a least-squares parabolic fit have a unique solution if and only if there are at least three different x-values in the observations. This requirement is satisfied by most real sets of quantitative observations. For particular data sets, the appropriateness of parabolic fits should be assessed with…
Descriptors: Problem Solving, Equations (Mathematics), Correlation, Least Squares Statistics
