Question

Any 2 points determine a line. If there are 6 points in a plane, no 3 of which lie on the same line, how many lines are determined by pairs of these 6 points?

Answer 1

@Luigi0210

Answer 2

Uhm, 15? >.<

Answer 3

That's what the answer says, I just don't know how they got it.

Answer 4

\[\frac{6*5}{2}\]

Answer 5

Can you draw a diagram for me?

Answer 6

I think you just use the combinations formula