For this case we have the following expression:

By definition, a coefficient is the term that accompanies one or more variables.
For example:

The coefficient of the linear term is 3.
So, in the given expression we have to:
-4 is the term that accompanies the variables xy.
Answer:
-4
Take 2 coordinates
Slope'-
Equation in point slope form
- y-0=6/7(x-1)
- 7y=6x-6
- y=6/7x-6/7
2x+3y=160
-2x+7y=25 I hope that helps!!