
Parviz F. answered 12/03/13
Tutor
4.8
(4)
Mathematics professor at Community Colleges
Y - intercept is a point. Lines are parallel with each others.
Maybe your question is 4 lines parallel with Y -axis
All vertical lines are parallel with Y- axis :
Their equation is X = k K= 1,2, 3,4 , .....
First 4 will be:
X= 1, X=2, X=3, X=4