How many times can two parallel lines intersect each other?

Two

Zero

One

Three

A set of concurrent lines has how many points of intersection?

At the point where the lines $y=-4x+1$y=−4x+1 and $y=x+11$y=x+11 intersect, $x=-2$x=−2. What is the $y$y-value at this point?

Consider the graph of the two lines $y=-4x+4$y=−4x+4 and $y=x-6$y=x−6.