What Is an Undefined Slope?

An undefined slope (or an infinitely large slope) is the slope of a vertical line! The x-coordinate never changes no matter what the y-coordinate is! There is no run! In this tutorial, learn about the meaning of undefined slope.

Is a slope of 0 undefined?

Well you know that having a 0 in the denominator is a big no, no. This means the slope is undefined. As shown above, whenever you have a vertical line your slope is undefined.

What is an undefined slope example?

A good real life example of undefined slope is an elevator since an elevator can only move straight up or straight down. It got its name "undefined" from the fact that it is impossible to divide by zero. ... In general, when the x-values or x-coordinates are the same for both points, the slope is undefined.