Answer:
B
Step-by-step explanation:
This is a straight line. Slope is a ratio of the change in y over the change in x
OR
∆y/∆x
∆=change
There is a change in y, which is -1, but there is not any change in x.
We can represent the ratio by writing the fraction -1/0
-1 is the change in y and 0 is the change in x
-1/0 is undefined so the slope of this line is 0 or Choice B
