Find the slope of the line that passes through the pair of points.
(-40.31,5.3) and (0.31,3.3)

the pictures have the answer

Step-by-step explanation:

So I would say any one of the following:

(1-.2)p

p-.2p

.8p

Step-by-step explanation:

If you start with price p and you are getting it marked down 20%, then you are paying (100-20)%p.

So you have:

(1-.2)p

or if you use distributive property:

1(p)-.2(p)

p-.2p

or if you combine the like terms:

.8p