So, let me assume that my best fit linear function has the form: Let me generically label the data as ( xi, yi ). So, I can write di and di2 as: Well that is just great. Now what?

If we set β = f (1), then for any real number x, we have f (x) = β x and the graph of this function is the straight line in the plane passing through the origin with slope β.

Because most cost-variable relationships aren't perfectly linear, using a linear function to estimate costs can sometimes produce incorrect values. Businesses may rely on these estimates when ...

Many data are suitably modeled by functions consisting of straight-line segments. These functions may be called piecewise-linear. Smooth functions that are related to the hyperbola and that have ...