Question

if the signs of the coordinates of collinear points are reversed, why are the new pts collinear?
ORIGINAL QUESTION:
If the signs of the coordinates of collinear points P(-6,-2), Q(-5,2), and R(-4,6) are reversed, are the three new points still collinear? Draw a picture and explain why.

Answer 1

Make up an example and check it yourself. It's easier than you think.

Answer 2

I already know that the pts are collinear b/c i drew my own graph. But I don't know hot to explain *why* they're always collinear in graphs.