if it's perpendicular to the y-z plane, then it has only an x component. So, it would be
r = (1+t)i + 3i + 11i
where t can be any real number.
find a vector equation of the line, which passes through the point (1,3,11) and is perpendicular to the yz-plane
2 answers
make that
r = (1+t)i + 3j + 11k
r = (1+t)i + 3j + 11k