Answer:
The slope of the two points is undefined because they have the same x value. And using the slope formula will also result to dividing by zero, which is also undefined.
Step-by-step explanation:
[tex] = \frac{y_{2} - y_{1}}{x_{2} - x_{1}} \\ = \frac{8 - 20}{19 - 19} \\ = \frac{ - 12}{0} \\ = undefined[/tex]
