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)
Keywords:  flattened, circle
a flattened circle