Answer:
Step-by-step explanation:
Okay so first
-3 - 4
---------
-1 - (-1)
When you subtract a negetive its really just adding so
-3 - 4
---------
-1 + 1
-3 - 4 is -7
-1 + 1 is 0
now we have -7/0
Which means our slope does not go horizontally at all! it only goes vertical
this actually means our slope is just undefined