Question

What is the Y intercept for a vertical line x equals 4

Answer 1

There is no vertical intercept.

Explanation:

The vertical line x = 4 never crosses the y axis and thus has no y-intercept. Rather, the two lines are parallel.

Answer 2

That's a trick question. The answer is: There is no Y intercept. A vertical line will never go across the Y axis unless the line was in X=0. As for the slope, it doesn't exist. You calculate the slope by dividing the change of Y by change of X. Since there is no change in X, it would be 0. It is IMPOSIBLE to divide by 0.