What’s the y-intercept of an undefined slope going through the origin?

Question

I have been wondering this because the slope is going through all points on the y-axis and I’m not sure if there is some specific word I should write or if I should just write 0 as the y-intercept

Answer 1

This is a vertical line, and since it goes through the origin, the line is the same as the y-axis.  Every point on this line is a y-intercept.