How do you find the y-intercept of an undefined slope?

Question

How do you find the y-intercept of an undefined slope? I need it for a project due tomorrow.

Answer 1

The undefined slope of a line is just a vertical line at x=k for some fixed number constant k

Unless it is x=0 there is no y-intercept. That is, the only vertical line that crosses the y-axis

is, in and of itself, the y-axis, at which x=0

No other vertical line will cross the y-axis