Question

are all collinear points coplanar?

Answer 1

Yes

Answer 2

YAA obviously!

Answer 3

Just a thought to ponder upon.
All collinear points are coplanar, but all coplanar points may or may not be collinear. :)

Answer 4

If points all lie on a line, surely you can find a plane with that line on it, right? In fact, you can find infinitely many planes!

Answer 5

Collinear points lie on a line. And you can have infinite planes through a line.