Three points lying on the same straight line are called collinear points.
If three or more points lie on the same line, they are called collinear points.
I don't understand the term collinear in a graph. Is that same to Three or more points lying on a straight and same line
Out of 18 points in a plane, no three are in the same straight line except 5 points which are collinear. How many straight lines can be formed by joining them?