Definitions for **"STRAIGHT LINE"**

A line which lies evenly with the points on itself.

a line traced by a point traveling in a constant direction; a line of zero curvature; "the shortest distance between two points is a straight line"

a line that equally with respect to all points on itself lies straight and maximally taut between its extremities

a first degree polynomial

a simple polynomial and goal of the fit is to determine the coefficients (the slope and intercept) of the polynomial that lead to the "best fit" of a line to the data

a wonderful thing to behold", and the teacher-baiting Mersey Tunnel Song)

a flattened circle