By 20 because 20 x 5 is 100
y = mx+b
(5-8)/(9-0) = -1/3 which is m
solve point slope to find slope intercept by using one of the points (0,8)
y-y1=m(x-x1)
y-8 = -1/3(x-0)
y-8 = -1/3x
Answer: y = -1/3x + 8
The story problem of shawn's poster length and width is the correct one
X1-x2/y1-y2 is what you need for ordered pair
