2) From the given graph
There are 2 points on the line (0, -1) and (-5, 2)
The rule of the slope of a line passes through points (x1, y1) and (x2, y2) is
x1 = 0 and y1 = -1
x2 = -5 and y2 = 2
Substitute them in the rule above to find the slope
The slope of the line is -3/5