Only one line can be drawn through eight points.
An infinite number of lines can be drawn through a single point, but only one through two points (of course, if the points don't have the same coordinates).
depend how many points are them
1
Between 2 distinct points, there are an infinite number of planes that can be drawn in 3 dimensions
Only one line can be drawn through eight points.
1 straight line. An infinite number of curved lines.
An infinite number of lines can be drawn through a single point, but only one through two points (of course, if the points don't have the same coordinates).
depend how many points are them
1
Between 2 distinct points, there are an infinite number of planes that can be drawn in 3 dimensions
Angles on a straight line add up to 180 degrees.
{(0,0)(1,3)(2,6)}
line segments
A line of best fit
One.
There is only one possible line that can can through two different points, presuming there are no overlaps.