65 bought 3 or more.
950x0.82=779
779-528=251
251-186=65
Final answer: 65
So the points are (-3/7,-8/3) and (-5/2,-2)
to find the slope do
(y2-y1)/(x2-x1)
(x,y)
x1=-3/7
y1=-8/3
x2=-5/2
y2=-2
subsitute

simplify by finding similar denomenators


add

multiply top and bottom by



answer is
slope=
Slope =

------------------------
6 - 6 = 0
15 - (-1) = 16
0 / 16 = 0
--------------------------------
You have a
slope of 0, meaning that this is a straight horizontal line