CollinearPoints
CollinearPoints[{p1, p2, p3, ..., pn}] tests whether the points p1, p2, p3, ..., pn are collinear.
Examples
Test if points are collinear:
CollinearPoints[{{0, 0}, {1, 1}, {2, 2}}]
(* True *)Non-collinear points:
CollinearPoints[{{0, 0}, {1, 1}, {2, 3}}]
(* False *)Please visit the official Wolfram Language Reference for more details.