David R. Duncan, Bonnie H. Litwiller, Investigations of Linear and Reciprocal Functions by the Line-to-Line Technique, The Two-Year College Mathematics Journal, Vol. 6, No. 2 (May, 1975), pp. 2-9 ...

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 ...

Ever wonder what sorts of errors freshman math students make? There are a couple of pretty basic ones.