What is the slope of the line that passes through the points (−9,8) (-9, 8) (−9,8) and (−21,10)? (-21, 10) ?(−21,10)? Write your answer in simplest form.

-1/6

Step-by-step explanation:

(−9,8) and (−21,10)

−21−(−9)

10−8  

Plug in.  

−21+9

10−8

The negative of a negative is a positive.  

−12

2

Add/Subtract.  

−  

6

1

A positive divided by a negative is a negative.Cancel the common factor of 2.

step-by-step explanation:

ratio is 2 : 9

the answer is three

13.5 : 3