Question

If p: two lines intersect and q: they share a common point, write not q implies not p as a conditional statement.

Answer 1

Q: they share a common point
\(\lnot Q\): they do not share a common point
P: two lines intersect
\(\lnot P\): two lines do not intersect

Answer 2

\(\lnot Q\to \lnot P\):
if two lines do not share a common point, then they do not intersect