EXPLANATION
The slope of a line is given by the following expression:
[tex]\text{Slope = }\frac{rise}{run}=\frac{(y_2-y_1)}{(x_2-x_1)}[/tex]In this case, we have that the slope is represented by the generic form:
y = mx + b
Where m is the slope and b is the y-intercept.
So, the slope is -7.
Answer: m=-7