Answer:
Slope of the line is -1.2
Option B is correct option.
Explanation:
We need to find slope of the line with given points (4, 10.5) and (8,5.7)
The formula used to calculate slope is:

The points given are: (4, 10.5) and (8,5.7)
We have

Putting values and finding slope

So, Slope of the line is -1.2
Option B is correct option.