What is the slope of the line in the graph

Answer:
In the pic
Step-by-step explanation:
First of all, in order to solve it you need to find the dots where the function crosses x line and y line.
Then, I named each dot according to the formula.
After that, it's just simple math.
If you have any questions about the way I solved it, don't hesitate to ask me in the comments below :)