I am sorry i do not know the answers
The answer to your question is 6.
Points E,D, AND B are in plane j
hope this helps
Yes the slope of a vertical line is parallel.
Parallel lines never intersect each other.
Y-axis is a vertical axis cartesian coordinate plane.
All vertical lines would be parallel to y-axis.
Because all vertical lines would have same slope, that is undefined slope.
Therefore, <em>all vertical lines would be parallel lines.</em>
So, we can finally say that it is possible for vertical lines to be parallel.