What is the slope of the line that passes through (-3,-1) and (-5,5)
You have two points, (x0, y0) = (-3, -1) and (x1, y1) = (-5, 5)
The slope of a line is given by,
m = (difference in y-values) / (difference in x-values)
m = (y1 - y0) / (x1 - x0)
m = (5 - (-1)) / (-5 - (-3))
m = (5 + 1) / (-5 + 3)
m = 6 / (-2)
m = -3