Finding the slope from points

Question

What is the slope of the line that passes through the points (-6, -6)(−6,−6) and (-9, -5)(−9,−5)?

Answer 1

(-6,-6) and (-9,-5) have a line through them with slope = -1/3

slope = difference in y divided by difference in x

= (-5--6)/(-9--6)=(-5+6)/(-9+6)=1/-3=-1/3