The slope of the line is: m= (Ysub2 - Ysub1) / (Xsub2 - Xsub1), where m is the slope of the line and Xsub1 is not equal to Xsub2.
Solution: Let the first ordered pair (-3, -8) be called (Xsub1, Ysub1) and the second ordered pair (4, -1) be called (Xsub2, Ysub2).
Substituting the values for m = (Ysub2 -Ysub1) / (Xsub2 - Xsub1) we have
m = [-1 -(-8)] /[4 -(-3)]
m = (-1 + 8) / (4 + 3)
m = 7/7 or m = 1 Therefore the slope of the line is one.