The number of possible line segment from six non-collinear points is _______

Answer 1

If we ignore the direction of each line segment, that is: segment AB is the same as segment BA, then you have
C(6,2) line segments, or 15

If you treat AB and BA different there would be 6*5 or 30

PS, this is the same question as the infamous hand-shake problem.
How many hand-shakes are there between 6 people if each person shakes hands with every other person? (pre COVID question)

Answer 2

yeah - now it's fist-bumps :-)