Answer:
2x+y=-5, or 2
Explanation:
The formula to find the equation of a line is y-y1=m(x-x1)
We will use that formula, and plug in the coordinates and slope.
y-(-3)=-2(x-(-1))
From here, we can simplify the equation.
y+3=-2(x+1)
y+3=-2x-2
y+2x=-2-3
y+2x=-5