Answer:
The answer is

Explanation:
The slope of a line given two points can be found by using the formula
m=y2-y1/x2-x1
where
(x1 , y1) and (x2 , y2) are the points
From the question the points are
(10, 8) and (1, 9)
The slope is
-1/9
We have the final answer as
-1/9
Hope this helps you