Answer:
Slope (m) = -5
Explanation:
Y=mx+b is the equation of a line
m represents the slope, and b is the y-intercept.
In your case, the slope would be -5
If the question were to ask about finding the y-intercept, you would then answer with 8. However, if it asks to find the x-intercept, you would set y to 0 and solve from there. (By the way, the x-intercept is 8/5)