Least-squares regression is the easiest method to approximate a cost function.

Name: Least-squares regression is the easiest method to approximate a cost function.
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Least-squares regression is a common method for estimating the parameters of a linear regression model, but it is not necessarily the easiest method for approximating a cost function, as ease depends on the context, data, and specific requirements of the problem. Other methods might be simpler or more appropriate depending on the situation.

Least-Squares Regression Is the Easiest Method to Approximate a Cost