The line passes through (6,1) with slope - 2

To find this you need the equation y=mx+b and you need to find b.

Y=1

X=6

m=-2

Now you have

1=6*-2+b

Now you have:

1=-12+b

Add 12 to both sides and get

13=b

Plug in b to the equation and your answer is y=-2x+13