Step-by-step explanation:
the slope of a line is the ratio "y coordinate change / x coordinate change" when going from one point to another on the line.
now, what I do in such a case, I look for points on the graph that have integer coordinates, as they are the essayist to read and then to calculate with.
I see e.g. (6, 10) and (10, 2).
now, when going from the first to the second point
x changes by +4 (from 6 to 10).
y changes by -8 (from 10 to 2).
so, the slope is -8/+4 = -2
