Answer:
The correct answer is A) undefined.
Step-by-step explanation:
In order to find this, pick two points on the line and use the slope equation. For the purpose of this, we'll use points (3, 1) and (3, 2).
m(slope) = (y2 - y1)/(x2 - x1)
m = (2 - 1)/(3 - 3)
m = 1/0
Since we cannot divide by 0, we know that it is undefined.
