# What is the slope of the line x = 4?

##### 1 Answer

Nov 11, 2015

Undefined

#### Explanation:

The slope

#m = (Delta y)/(Delta x) = (y_2-y_1)/(x_2-x_1)#

In the case of the line

#m = (1 - 0)/(4-4) = 1/0#

... which is undefined.

You might try to say that its slope is 'infinite', but actually it's not clear whether that should be