Answer:
Undefined
Step-by-step explanation:
Vertical lines will always have undefined slopes. This is a vertical line because it is straight up and down.
To make sure, we can test 2 points: (2,1) and (2,2) in the slope formula
y2-y1/x2-x1
2-1/2-2
1/0
It is impossible to divide by 0, so the slope is undefined.
